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| logo = Cogent Communications logo.svg
| logo = Cogent Communications logo.svg
| logo_alt = Cogent Communications logo
| logo_alt = Cogent Communications logo

| image =

| image_caption = Cogent headquarters in Washington, D.C.
| type = [[Public company|Public]]
| type = [[Public company|Public]]
| traded_as = {{ubl|{{NASDAQ|CCOI}}|[[S&P 600]] component}}
| traded_as = {{ubl|{{NASDAQ|CCOI}}|[[S&P 600]] component}}
| foundation = 1999
| foundation = {{start date and age|1999}}
| founder = David Schaeffer
| founder = David Schaeffer
| location = [[Washington, D.C.]], U.S.
| location = [[Washington, D.C.]], U.S.
Line 15: Line 19:
| industry = [[Telecommunications]]
| industry = [[Telecommunications]]
| products =
| products =
| revenue = {{Increase}} {{US$|599.604&nbsp;million|link=yes}} (2022)<ref name="2022 Cogent SEC Form 10-K">{{cite web |url=https://www.sec.gov/ix?doc=/Archives/edgar/data/1158324/000110465923025123/ccoi-20221231x10k.htm|title=2022 Cogent Communications SEC Form 10-K |publisher=[[Securities and Exchange Commission]]|access-date=November 20, 2023}}</ref>
| revenue = {{Increase}} {{US$|940.922&nbsp;million|link=yes}}<ref name="2023 Cogent Annual Report">{{cite web |url=https://www.cogentco.com/files/docs/about_cogent/investor_relations/reports/10k_report_2023.pdf|title=2023 Cogent Communications Annual Report |publisher=[[Cogent Communications]]|access-date=25 March 2024}}</ref>
| revenue_year = 2023
⚫
| operating_income = {{Decrease}} {{US$|113.959&nbsp;million|link=yes}} (2022)<ref name="2022 Cogent SEC Form 10-K"/>
| net_income = {{Decrease}} {{US$|5.146&nbsp;million|link=yes}} (2022)<ref name="2022 Cogent SEC Form 10-K"/>
| operating_income = {{Decrease}} {{US$|(129.329)&nbsp;million|link=yes}}<ref name="2023 Cogent Annual Report"/>
| income_year = 2023
⚫
| assets = {{Increase}} {{US$|1.010&nbsp;billion|link=yes}} (2022)<ref name="2022 Cogent SEC Form 10-K"/>
| equity = {{Decrease}} {{US$|42.338&nbsp;million|link=yes}} (2022)<ref name="2022 Cogent SEC Form 10-K"/>
| net_income = {{Increase}} {{US$|1.273&nbsp;billion|link=yes}}<ref name="2023 Cogent Annual Report"/>
| net_income_year = 2023
⚫
| num_employees = 1,076 (2022)<ref name="2022 Cogent SEC Form 10-K"/>
⚫
| assets = {{Increase}} {{US$|3.211&nbsp;billion|link=yes}}<ref name="2023 Cogent Annual Report"/>
| assets_year = 2023
⚫
| equity = {{Decrease}} {{US$|0.422&nbsp;million|link=yes}}<ref name="2023 Cogent Annual Report"/>
| equity_year = 2023
⚫
| num_employees = 1,947<ref name="2023 Cogent Annual Report"/>
| num_employees_year = 2023
| homepage = {{URL|https://www.cogentco.com/en/|www.cogentco.com}}
| homepage = {{URL|https://www.cogentco.com/en/|www.cogentco.com}}
| module = {{Infobox NSP
| module = {{Infobox NSP
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}}
}}
}}
}}
'''Cogent Communications''' is a multinational [[internet service provider]] based in the United States. Cogent's primary services consist of Internet access and data transport, offered on a fiber optic, IP data-only network, along with colocation in data centers.<ref name="Cogent-Communications-Nov-2012-10-Q">{{cite web|url=http://pdf.secdatabase.com/2094/0001104659-12-075320.pdf |title=Cogent Communications, Form 10-Q, Quarterly Report, Filing Date Nov 7, 2012 |publisher=secdatabase.com |access-date =March 27, 2013}}</ref> <ref>{{Cite web|title=About Cogent|url=https://cogentco.com/en/about-cogent|access-date=April 10, 2022|website=cogentco.com}}</ref>
'''Cogent Communications Holdings, Inc.''' is a multinational [[internet service provider]] based in the United States. Cogent's primary services consist of Internet access and data transport, offered on a fiber optic, IP data-only network, along with colocation in data centers.<ref name="Cogent-Communications-Nov-2012-10-Q">{{cite web|url=http://pdf.secdatabase.com/2094/0001104659-12-075320.pdf |title=Cogent Communications, Form 10-Q, Quarterly Report, Filing Date Nov 7, 2012 |publisher=secdatabase.com |access-date =March 27, 2013}}</ref> <ref>{{Cite web|title=About Cogent|url=https://cogentco.com/en/about-cogent|access-date=April 10, 2022|website=cogentco.com}}</ref>


==Acquisition history==
==Acquisition history==
Cogent was founded in 1999 at the peak of the industry's growth and was funded by angel investors including members of [[Keiretsu Forum]].<ref name="Cogent-Communications-Oct-2001-S-4">{{cite web|url=http://pdf.secdatabase.com/2465/0000912057-01-535608.pdf |title=Cogent Communications, Form S-4, Filing Date Oct 16, 2001 |publisher=secdatabase.com |access-date =March 27, 2013}}</ref> In three years, Cogent acquired 13 other failing carriers, purchasing $14 billion in capital for $60 million, including $4 billion worth of Property, Plant and Equipment.<ref>{{Cite web |url=http://lw.pennnet.com/display_article/308794/13/ARTCL/none/none/Cogent-Communications-banks-on-Ethernet-over-IP/ |title=Lightwave – Cogent Communications banks on Ethernet over IP<!-- Bot generated title --> |access-date=May 19, 2008 |archive-date=2009-06-15 |archive-url=https://web.archive.org/web/20090615045227/http://lw.pennnet.com/display_article/308794/13/ARTCL/none/none/Cogent-Communications-banks-on-Ethernet-over-IP/ |url-status=dead }}</ref>
Cogent was founded in 1999 at [[Dot-com bubble|the peak of the industry's growth]] and was funded by angel investors including members of [[Keiretsu Forum]].<ref name="Cogent-Communications-Oct-2001-S-4">{{cite web|url=http://pdf.secdatabase.com/2465/0000912057-01-535608.pdf |title=Cogent Communications, Form S-4, Filing Date Oct 16, 2001 |publisher=secdatabase.com |access-date =March 27, 2013}}</ref> In three years, Cogent acquired 13 other failing carriers, purchasing $14 billion in capital for $60 million, including $4 billion worth of Property, Plant and Equipment.<ref>{{Cite web |url=http://lw.pennnet.com/display_article/308794/13/ARTCL/none/none/Cogent-Communications-banks-on-Ethernet-over-IP/ |title=Lightwave – Cogent Communications banks on Ethernet over IP<!-- Bot generated title --> |access-date=May 19, 2008 |archive-date=2009-06-15 |archive-url=https://web.archive.org/web/20090615045227/http://lw.pennnet.com/display_article/308794/13/ARTCL/none/none/Cogent-Communications-banks-on-Ethernet-over-IP/ |url-status=dead }}</ref>
* September 2001 – Acquires the assets of [[NetRail]]<ref name="Cogent-Communications-Oct-2001-S-4" />
* September 2001 – Acquires the assets of [[NetRail]]<ref name="Cogent-Communications-Oct-2001-S-4" />
* February 2002 – Acquires [[Allied Riser]]<ref name="Cogent-Communications-Aug-2001-425">{{cite web|url=http://pdf.secdatabase.com/476/0000912057-01-530620.pdf |title=Cogent Communications, Form 425, Filing Date Aug 29, 2001 |publisher=secdatabase.com |access-date=March 27, 2013}}</ref><ref name="Cogent-Communications-Feb-2002-8-K">{{cite web|url=http://edgar.secdatabase.com/2955/91205702003942/filing-main.htm |title=Cogent Communications, Form 8-K, Current Report, Filing Date Feb 5, 2002 |publisher=secdatabase.com |access-date=March 27, 2013}}</ref>
* February 2002 – Acquires [[Allied Riser]]<ref name="Cogent-Communications-Aug-2001-425">{{cite web|url=http://pdf.secdatabase.com/476/0000912057-01-530620.pdf |title=Cogent Communications, Form 425, Filing Date Aug 29, 2001 |publisher=secdatabase.com |access-date=March 27, 2013}}</ref><ref name="Cogent-Communications-Feb-2002-8-K">{{cite web|url=http://edgar.secdatabase.com/2955/91205702003942/filing-main.htm |title=Cogent Communications, Form 8-K, Current Report, Filing Date Feb 5, 2002 |publisher=secdatabase.com |access-date=March 27, 2013}}</ref>
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On March 14, 2008, after Cogent stopped routing packets from European network provider [[TeliaSonera|Telia]] ([[Autonomous system (Internet)|AS]] 1299), their two networks lost mutual connectivity.<ref name="giga-malik"/> The connection was reestablished March 28, 2008 with interconnection points in both the United States and Europe.<ref>[http://thelocal.se/10786/20080330/ Telia resolves internet dispute] {{webarchive|url=https://web.archive.org/web/20080607080053/http://www.thelocal.se/10786/20080330/ |date=2008-06-07 }}, http://thelocal.se, Peter Vinthagen Simpson, 2008-03-30</ref>
On March 14, 2008, after Cogent stopped routing packets from European network provider [[TeliaSonera|Telia]] ([[Autonomous system (Internet)|AS]] 1299), their two networks lost mutual connectivity.<ref name="giga-malik"/> The connection was reestablished March 28, 2008 with interconnection points in both the United States and Europe.<ref>[http://thelocal.se/10786/20080330/ Telia resolves internet dispute] {{webarchive|url=https://web.archive.org/web/20080607080053/http://www.thelocal.se/10786/20080330/ |date=2008-06-07 }}, http://thelocal.se, Peter Vinthagen Simpson, 2008-03-30</ref>


On June 6, 2011, Cogent automatically stopped peering with The Department of Energy Sciences Network ([[Energy Sciences Network|ESnet]]) causing a disruption for three days.<ref>{{Cite web |date=2011-06-11 |title=ESnet announcement Thurs |url=http://es.net/news-and-publications/important-status-regarding-cogent-connectivity/ |access-date=2023-05-10 |archive-url=https://web.archive.org/web/20110611002310/http://es.net/news-and-publications/important-status-regarding-cogent-connectivity/ |archive-date=2011-06-11 }}</ref>
On June 6, 2011, Cogent automatically stopped peering with the US Department of Energy's Energy Sciences Network ([[Energy Sciences Network|ESnet]]) causing a disruption for three days.<ref>{{Cite web |date=2011-06-11 |title=ESnet announcement Thurs |url=http://es.net/news-and-publications/important-status-regarding-cogent-connectivity/ |access-date=2023-05-10 |archive-url=https://web.archive.org/web/20110611002310/http://es.net/news-and-publications/important-status-regarding-cogent-connectivity/ |archive-date=2011-06-11 }}</ref>


In November 2015, CenturyLink signed a new long-term bilateral interconnection agreement with Cogent Communications.<ref>{{Cite web|url=https://www.fiercetelecom.com/telecom/centurylink-cogent-sign-new-interconnection-agreement|title=CenturyLink, Cogent sign new interconnection agreement {{!}} FierceTelecom|website=www.fiercetelecom.com|language=en|access-date=June 27, 2018}}</ref>
In November 2015, CenturyLink signed a new long-term bilateral interconnection agreement with Cogent Communications.<ref>{{Cite web|url=https://www.fiercetelecom.com/telecom/centurylink-cogent-sign-new-interconnection-agreement|title=CenturyLink, Cogent sign new interconnection agreement {{!}} FierceTelecom|website=www.fiercetelecom.com|language=en|access-date=June 27, 2018}}</ref>


In December 2015, Cogent sues [[Deutsche Telekom]]. Cogent claims that DTAG failed to increase interconnection capacity between the two networks. According to a statement released by Cogent <ref>{{Cite web|url=https://cogentco.com/files/docs/news/press_releases/Cogent_Sues_Deutsche_Telekom_for_Congesting_Internet_Connections.pdf|title=Statement released in December 2015 when Cogent sued Deutsche Telekom {{!}} Cogent|website=cogentco.com|language=en|access-date=June 26, 2023}}</ref> “Deutsche Telekom has interfered with the free flow of Internet traffic between Cogent customers and Deutsche Telekom customers by refusing to increase the capacity of the interconnection ports that allow the exchange of traffic”
In December 2015, Cogent sued [[Deutsche Telekom]]. Cogent claimed that DTAG failed to increase interconnection capacity between the two networks. According to a statement released by Cogent <ref>{{Cite web|url=https://cogentco.com/files/docs/news/press_releases/Cogent_Sues_Deutsche_Telekom_for_Congesting_Internet_Connections.pdf|title=Statement released in December 2015 when Cogent sued Deutsche Telekom {{!}} Cogent|website=cogentco.com|language=en|access-date=June 26, 2023}}</ref> “Deutsche Telekom has interfered with the free flow of Internet traffic between Cogent customers and Deutsche Telekom customers by refusing to increase the capacity of the interconnection ports that allow the exchange of traffic”


Cogent has yet to agree on peering with the biggest IPv6 connectivity provider, [[Hurricane Electric]]. {{As of|2023|03|post=,}} direct connectivity between the two networks is impossible.<ref>{{Cite web|url=http://mailman.nanog.org/pipermail/nanog/2009-October/014017.html|title=IPv6 internet broken, cogent/telia/hurricane not peering|first=Mike|last=Leber|archive-url=https://web.archive.org/web/20091016011024/https://mailman.nanog.org/pipermail/nanog/2009-October/014017.html|archive-date=2009-10-16}}</ref>
There is a long-running dispute between Cogent and Hurricane Electric. Cogent has been refusing to peer [[Settlement-free interconnect|settlement-free]] with Hurricane Electric, the (according to themselves) largest IPv6 network<ref>{{Cite web |title=BGP Peer Report - bgp.he.net |url=https://bgp.he.net/report/peers |access-date=2024-09-18 |website=bgp.he.net}}</ref> since 2009. Due to this, IPv6 traffic cannot be interchanged between both networks.<ref>{{Cite web|url=http://mailman.nanog.org/pipermail/nanog/2009-October/014017.html|title=IPv6 internet broken, cogent/telia/hurricane not peering|first=Mike|last=Leber|archive-url=https://web.archive.org/web/20091016011024/https://mailman.nanog.org/pipermail/nanog/2009-October/014017.html|archive-date=2009-10-16}}</ref> IPv4 traffic can still be interchanged since Hurricane Electric is only a [[Tier 1 network|Tier 1]] operator for IPv6 but not for IPv4. IPv4 traffic between both networks is routed via [[Arelion]].<ref>{{Cite web |title=AS6939 Hurricane Electric LLC - bgp.he.net |url=https://bgp.he.net/AS6939#_graph4 |access-date=2024-09-21 |website=bgp.he.net}}</ref>


Cogent and [[Google]] have also stopped IPv6 peering in 2016.<ref>[http://adminhacks.com/broken-IPv6.html adminhacks.org, March 2016]</ref> This is rumored to be closely tied to Cogent leveraging Google's IPv4 traffic via a paid customer or to maintain [[Peering|Settlement-Free Interconnect]] with another network.<ref>{{Cite web|url=https://mailman.nanog.org/pipermail/nanog/2016-February/084268.html|title=Cogent & Google IPv6|last=Murenin|first=Constantine A.|date=2017-02-25|access-date=2023-11-14}}</ref>{{spec|date=November 2023}} {{As of|2023|11|post=,}} the two networks appear to be reachable over IPv6 via [[Tata Communications]].<ref>{{cite web |last1=Bonfiglio |first1=Giorgio |title=Am I the only one who thinks this is disconcerting? |url=https://mailman.nanog.org/pipermail/nanog/2023-November/224018.html |access-date=2023-11-14 |date=2023-11-13}}</ref>
Cogent and [[Google]] have also stopped IPv6 peering in 2016.<ref>[http://adminhacks.com/broken-IPv6.html adminhacks.org, March 2016]</ref> This is rumored to be closely tied to Cogent leveraging Google's IPv4 traffic via a paid customer or to maintain [[Peering|settlement-free interconnect]] with another network.<ref>{{Cite web|url=https://mailman.nanog.org/pipermail/nanog/2016-February/084268.html|title=Cogent & Google IPv6|last=Murenin|first=Constantine A.|date=2017-02-25|access-date=2023-11-14}}</ref>{{spec|date=November 2023}} {{As of|2023|11|post=,}} the two networks appear to be reachable over IPv6 via [[Tata Communications]].<ref>{{cite web |last1=Bonfiglio |first1=Giorgio |title=Am I the only one who thinks this is disconcerting? |url=https://mailman.nanog.org/pipermail/nanog/2023-November/224018.html |access-date=2023-11-14 |date=2023-11-13}}</ref>


In February 2017, Cogent blocked many [[Legal aspects of file sharing|piracy]] and streaming sites including [[The Pirate Bay]].<ref>{{cite news|title=Internet Backbone Provider Cogent Blocks Pirate Bay and other "Pirate" Sites - TorrentFreak|url=https://torrentfreak.com/internet-backbone-provider-cogent-blocks-pirate-bay-and-other-pirate-sites-170209/|work=TorrentFreak|date=9 February 2017}}</ref> This was unintentional due to a poorly crafted Spanish court order.<ref>{{Cite news|url=https://arstechnica.com/tech-policy/2017/02/a-court-order-blocked-pirate-sites-that-werent-supposed-to-be-blocked/|title=A court order blocked pirate sites that weren't supposed to be blocked|work=Ars Technica|access-date=March 2, 2017|language=en-us}}</ref>
In February 2017, Cogent blocked many [[Legal aspects of file sharing|piracy]] and streaming sites including [[The Pirate Bay]].<ref>{{cite news|title=Internet Backbone Provider Cogent Blocks Pirate Bay and other "Pirate" Sites - TorrentFreak|url=https://torrentfreak.com/internet-backbone-provider-cogent-blocks-pirate-bay-and-other-pirate-sites-170209/|work=TorrentFreak|date=9 February 2017}}</ref> This was unintentional due to a poorly crafted Spanish court order.<ref>{{Cite news|url=https://arstechnica.com/tech-policy/2017/02/a-court-order-blocked-pirate-sites-that-werent-supposed-to-be-blocked/|title=A court order blocked pirate sites that weren't supposed to be blocked|work=Ars Technica|access-date=March 2, 2017|language=en-us}}</ref>

In February 2024, Cogent withdrew peering with [[NTT Communications|NTT]] in Europe,<ref>{{Cite web |date=14 Feb 2024 |title=Cogent starts de-peering with NTT due to lack of 'Asia connectivity' |url=https://lowendtalk.com/discussion/192764/cogent-starts-de-peering-with-ntt-due-to-lack-of-asia-connectivity |website=LowEndTalk}}</ref><ref>{{Cite web |date=14 Feb 2024 |title=AS174 (Cogent) and AS2914 (NTT) have depeered in Europe |url=https://twitter.com/bgptools/status/1757771345520185560}}</ref> forcing all their peering traffic to go through their common remaining interconnections in USA, increasing latency and traffic loss between both networks, to complain against refusal of peering settlements in Asia from NTT.

In May 2024, Cogent withdrew peering with [[Tata Communications]] completely,<ref>{{Cite web |title=x.com |url=https://x.com/bgptools/status/1791470879697752258 |access-date=2024-05-20 |website=X (formerly Twitter)}}</ref> due to this networks that are single homed behind AS6453 (in APAC) or AS174 will not be able to reach each other. This is similar but more serious to the previous regional NTT-Cogent depeerings (since the NTT ones "just" increased latency by routing via the US instead). Despite what Cogent reported, Cogent has not de-peered, rather blocked routes to TATA single-homed transit.

However, in June 2024 this peering dispute was resolved. Connectivity between Cogent and TATA has been restored and is operating normally.<ref>https://x.com/DougMadory/status/1802731096217407740?t=GnXKgdQ63ap0NXHuMpuTMw&s=19 </ref>


==References==
==References==

Latest revision as of 02:51, 21 September 2024

Cogent Communications Holdings, Inc.
Company typePublic
IndustryTelecommunications
Founded1999; 25 years ago (1999)
FounderDavid Schaeffer
HeadquartersWashington, D.C., U.S.
Key people
  • David Schaeffer (CEO)
  • Thaddeus Weed (CFO)
RevenueIncrease US$940.922 million[1] (2023)
Decrease US$(129.329) million[1] (2023)
Increase US$1.273 billion[1] (2023)
Total assetsIncrease US$3.211 billion[1] (2023)
Total equityDecrease US$0.422 million[1] (2023)
Number of employees
1,947[1] (2023)
ASN
Traffic Levels100 Tbps+[2]
Websitewww.cogentco.com

Cogent Communications Holdings, Inc. is a multinational internet service provider based in the United States. Cogent's primary services consist of Internet access and data transport, offered on a fiber optic, IP data-only network, along with colocation in data centers.[3] [4]

Acquisition history

[edit]

Cogent was founded in 1999 at the peak of the industry's growth and was funded by angel investors including members of Keiretsu Forum.[5] In three years, Cogent acquired 13 other failing carriers, purchasing $14 billion in capital for $60 million, including $4 billion worth of Property, Plant and Equipment.[6]

In September, 2022, it was announced that Cogent was buying the Sprint Corporation wireline business from T-Mobile for $1.00, assuming some liabilities.[16]

Peering disputes

[edit]

Cogent has been controversial in the ISP market for low bandwidth pricing and its public disputes over peering with AOL (2003),[17] Level 3 Communications (2005),[18] France Telecom (2006),[19] Limelight Networks (2007),[20] Telia Carrier (March 2008),[21] and Sprint Nextel (October 2008).[22]

On March 14, 2008, after Cogent stopped routing packets from European network provider Telia (AS 1299), their two networks lost mutual connectivity.[21] The connection was reestablished March 28, 2008 with interconnection points in both the United States and Europe.[23]

On June 6, 2011, Cogent automatically stopped peering with the US Department of Energy's Energy Sciences Network (ESnet) causing a disruption for three days.[24]

In November 2015, CenturyLink signed a new long-term bilateral interconnection agreement with Cogent Communications.[25]

In December 2015, Cogent sued Deutsche Telekom. Cogent claimed that DTAG failed to increase interconnection capacity between the two networks. According to a statement released by Cogent [26] “Deutsche Telekom has interfered with the free flow of Internet traffic between Cogent customers and Deutsche Telekom customers by refusing to increase the capacity of the interconnection ports that allow the exchange of traffic”

There is a long-running dispute between Cogent and Hurricane Electric. Cogent has been refusing to peer settlement-free with Hurricane Electric, the (according to themselves) largest IPv6 network[27] since 2009. Due to this, IPv6 traffic cannot be interchanged between both networks.[28] IPv4 traffic can still be interchanged since Hurricane Electric is only a Tier 1 operator for IPv6 but not for IPv4. IPv4 traffic between both networks is routed via Arelion.[29]

Cogent and Google have also stopped IPv6 peering in 2016.[30] This is rumored to be closely tied to Cogent leveraging Google's IPv4 traffic via a paid customer or to maintain settlement-free interconnect with another network.[31][speculation?] As of November 2023, the two networks appear to be reachable over IPv6 via Tata Communications.[32]

In February 2017, Cogent blocked many piracy and streaming sites including The Pirate Bay.[33] This was unintentional due to a poorly crafted Spanish court order.[34]

In February 2024, Cogent withdrew peering with NTT in Europe,[35][36] forcing all their peering traffic to go through their common remaining interconnections in USA, increasing latency and traffic loss between both networks, to complain against refusal of peering settlements in Asia from NTT.

In May 2024, Cogent withdrew peering with Tata Communications completely,[37] due to this networks that are single homed behind AS6453 (in APAC) or AS174 will not be able to reach each other. This is similar but more serious to the previous regional NTT-Cogent depeerings (since the NTT ones "just" increased latency by routing via the US instead). Despite what Cogent reported, Cogent has not de-peered, rather blocked routes to TATA single-homed transit.

However, in June 2024 this peering dispute was resolved. Connectivity between Cogent and TATA has been restored and is operating normally.[38]

References

[edit]
  1. ^ a b c d e f "2023 Cogent Communications Annual Report" (PDF). Cogent Communications. Retrieved 25 March 2024.
  2. ^ Cogent Communications, Inc. "PeeringDB". PeeringDB. Retrieved May 8, 2022.
  3. ^ "Cogent Communications, Form 10-Q, Quarterly Report, Filing Date Nov 7, 2012" (PDF). secdatabase.com. Retrieved March 27, 2013.
  4. ^ "About Cogent". cogentco.com. Retrieved April 10, 2022.
  5. ^ a b "Cogent Communications, Form S-4, Filing Date Oct 16, 2001" (PDF). secdatabase.com. Retrieved March 27, 2013.
  6. ^ "Lightwave – Cogent Communications banks on Ethernet over IP". Archived from the original on 2009-06-15. Retrieved May 19, 2008.
  7. ^ "Cogent Communications, Form 425, Filing Date Aug 29, 2001" (PDF). secdatabase.com. Retrieved March 27, 2013.
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