AS174 · US — Cogent Communications, LLC

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COGENT-174 · ARIN · US

Identity source

AS174 ·

US Cogent Communications, LLC

NRO allocation data

3,916IPv4 prefixes

451IPv6 prefixes

1,870Observed neighbors

RPKIValid: 449 Invalid: 11 Not found: 3907 Unknown: 0

Selected local snapshot coverage; not the whole Internet. BGP snapshots: ris-rrc00 11 Oct 00:00 UTC; routeviews2 11 Oct 04:00 UTC; routeviews6 11 Oct 04:00 UTC. Validator: 11 Oct 05:23 UTC. Publication-point issues: 89

Address space details

Overlapping originated prefixes counted once. IPv4 addresses: 36,336,896

IPv6 addresses: 3981367490995054407351596482560

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Observed originated prefixes

These are observed BGP origins, not an inventory of registered allocations or transit reachability.

451 matching prefix–origin pairs. Each pair appears once; source observations are in Details.

Prefix	RPKI	Last observed	Details
2001:550::/32	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found
2001:550:104::/48	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found
2001:550:107::/48	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found
2001:550:108::/48	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found
2001:550:201::/48	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found
2001:550:202::/48	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found
2001:550:203::/48	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found
2001:550:204::/48	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found
2001:550:205::/48	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found
2001:550:206::/48	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found
2001:550:209::/48	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found
2001:550:20a::/48	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found
2001:550:20b::/48	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found
2001:550:302::/48	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found
2001:550:303::/48	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found
2001:550:304::/48	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found
2001:550:306::/48	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found
2001:550:307::/48	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found
2001:550:308::/48	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found
2001:550:309::/48	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found
2001:550:30c::/48	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found
2001:550:30d::/48	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found
2001:550:402::/48	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found
2001:550:407::/48	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found
2001:550:408::/48	Not Found	11 Oct 04:00 UTC	2 source observations ris-rrc00 · 2026-10-11T00:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T04:00:00+00:00 · 1 selected peers · RPKI not_found

Next rows

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Observed AS neighbors

1870 unique neighbors in the selected local snapshots. This is the available collector dataset, not a complete map of the Internet. Adjacency does not establish upstream service or peering.

1870 matching neighbors · 1–25 shown

Network	IPv4/IPv6	Seen in	Last observed	Details
AS14 · US Columbia University	IPv6	ris-rrc00	11 Oct 00:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC
AS20 · US University of Rochester	IPv6	ris-rrc00	11 Oct 00:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC
AS55 · US University of Pennsylvania	IPv6	ris-rrc00	11 Oct 00:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC
AS62 · US CyrusOne LLC	IPv6	ris-rrc00	11 Oct 00:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC
AS81 · US MCNC	IPv6	ris-rrc00, routeviews6	11 Oct 04:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC routeviews6 · IPv6 · 11 Oct 04:00 UTC
AS91 · US Rensselaer Polytechnic Institute	IPv6	ris-rrc00, routeviews6	11 Oct 04:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC routeviews6 · IPv6 · 11 Oct 04:00 UTC
AS92 · US Clarkson University	IPv6	ris-rrc00	11 Oct 00:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC
AS101 · US University of Washington	IPv6	ris-rrc00	11 Oct 00:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC
AS111 · US Boston University	IPv6	ris-rrc00	11 Oct 00:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC
AS122 · US UPMC	IPv6	ris-rrc00	11 Oct 00:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC
AS210 · US Utah Education Network	IPv6	ris-rrc00	11 Oct 00:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC
AS237 · US Merit Network Inc.	IPv6	ris-rrc00	11 Oct 00:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC
AS376 · CA Reseau d'Informations Scientifiques du Quebec (RISQ Inc.)	IPv6	ris-rrc00	11 Oct 00:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC
AS577 · CA Bell Canada	IPv6	ris-rrc00	11 Oct 00:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC
AS701 · US Verizon Business	IPv6	ris-rrc00	11 Oct 00:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC
AS702 · US Verizon Business	IPv6	ris-rrc00	11 Oct 00:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC
AS703 · US Verizon Business	IPv6	ris-rrc00	11 Oct 00:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC
AS766 · ES RedIRIS Entidad Publica Empresarial Red.es	IPv6	ris-rrc00	11 Oct 00:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC
AS803 · CA Saskatchewan Telecommunications	IPv6	ris-rrc00	11 Oct 00:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC
AS812 · CA Rogers Communications Canada Inc.	IPv6	ris-rrc00	11 Oct 00:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC
AS835 · CA GOCODEIT-EDGE - GoCodeIT Inc	IPv6	ris-rrc00	11 Oct 00:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC
AS852 · CA TELUS Communications Inc.	IPv6	ris-rrc00	11 Oct 00:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC
AS897 · US TURTLE-ROCK-STUDIOS - Turtle Rock Studios, Inc.	IPv6	ris-rrc00	11 Oct 00:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC
AS906 · US DMIT - DMIT Cloud Services	IPv6	ris-rrc00, routeviews6	11 Oct 04:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC routeviews6 · IPv6 · 11 Oct 04:00 UTC
AS932 · US XNNET LLC	IPv6	ris-rrc00	11 Oct 00:00 UTC	Source observations ris-rrc00 · IPv6 · 11 Oct 00:00 UTC

Next neighbors

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View observed neighbor graph (up to 15 AS nodes)

Lines mean observed adjacency, with no commercial direction inferred. The table above provides the same evidence and source times.

Showing 14 of 1870 matching neighbors, in table sort order, independent of table page.

Peering & locations

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Registry information

ARIN · fetched 10 Oct 20:09 UTC

Resource name: COGENT-174
Handle: AS174
RDAP country: Not supplied
ASN: 174

Registered organizations

Cogent Communications, LLC

Last Changed: 02 Mar 2012 13:03 UTC

Registration: 16 May 1996 04:00 UTC

Registry source

Allocation statistics

NRO/RIR delegated-extended records describe allocation or assignment ranges. They do not prove a BGP announcement or replace more-specific RDAP registration information. Country is the allocation record’s registration country, not the physical location of every address.

AS174–AS174 · arin · assigned · ASN allocation country: US · Allocation date: 1996-05-16 — NRO/RIR data · snapshot 10 Oct 00:00 UTC

NRO data and format

Prefix count history

Local observation changes

Only comparable successful snapshots are compared. First imports, changed peer coverage and collection gaps are baselines, not new global routes or withdrawals. RPKI transition history is not available before it has been recorded.

11 Oct 00:00 UTC · Origin changed · 38.22.219.0/24
1 source observations
- routeviews2 · imported 11 Oct 01:01 UTC
  Origins: [174] → [100]
10 Oct 18:00 UTC · First observed by pjhtech · 38.252.206.0/24
1 source observations
- routeviews2 · imported 10 Oct 18:37 UTC
10 Oct 16:00 UTC · First observed by pjhtech · 65.174.252.0/24
1 source observations
- ris-rrc00 · imported 10 Oct 16:34 UTC
10 Oct 14:00 UTC · First observed by pjhtech · 208.30.14.0/23
1 source observations
- routeviews2 · imported 10 Oct 14:53 UTC

Retained local prefix-count observations

Separate collector series. Missing rows are not zero. Peer-set changes are separate coverage, not a continuous trend.

Source	Snapshot	Family	Prefixes	Peer coverage
routeviews2	11 Oct 04:00 UTC	IPv4	3820	140.192.8.16/IPv4
routeviews6	11 Oct 04:00 UTC	IPv6	450	2406:840:feed:2::1/IPv6
routeviews2	11 Oct 02:00 UTC	IPv4	3820	140.192.8.16/IPv4
routeviews6	11 Oct 02:00 UTC	IPv6	450	2406:840:feed:2::1/IPv6
ris-rrc00	11 Oct 00:00 UTC	IPv4	3901	2a00:5884::6/IPv6, 89.234.186.6/IPv4
ris-rrc00	11 Oct 00:00 UTC	IPv6	449	2a00:5884::6/IPv6, 89.234.186.6/IPv4
ris-rrc00	10 Oct 16:00 UTC	IPv4	3901	2a00:5884::6/IPv6, 89.234.186.6/IPv4
ris-rrc00	10 Oct 16:00 UTC	IPv6	449	2a00:5884::6/IPv6, 89.234.186.6/IPv4