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AS1204The State University of New York

United StatesRegistryARIN

As of 23rd October 2026, AS1204 (The State University of New York), a network registered in the United States with ARIN, originates 28 IPv4 prefixes covering 79.1k addresses. By IPv4 address space that makes it the 2,800th-largest of the 79,652 networks we see originating IPv4, and the 901st-largest of 18,475 in the United States. It is seen behind 5 upstream networks, most often AS174 (Cogent Communications, LLC) and AS13335 (Cloudflare, Inc.). None of its announcements have a valid RPKI ROA. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

28

IPv6 prefixes

0

IPv4 addresses

79.1k

IPv6 /64s

0

Upstream graph

The networks AS1204 is seen behind, one and two hops out, drawn from real AS paths.

AS1204Toward the internet core
Upstream graph for AS1204: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS1204The State Univers…This networkAS174Cogent Communicat…AS3356Lumen (Level 3)AS3630NYSERNetAS3754NYSERNetAS13335Cloudflare, Inc.AS1299Arelion (fka. Tel…AS151326DCConnect Communi…AS3549Lumen (fka. Globa…AS2914NTT America, Inc.AS293ESnetAS11537Internet2AS6453TATA Communicatio…

Networks observed one and two hops upstream of AS1204 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

11

adjacent networks

Upstreams
545%
Peers
655%
Downstreams
00%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS1204
NetworkCountryRelationshipPathsVantage pts
AS174Cogent Communications, LLCUSPeer1,15176
AS13335Cloudflare, Inc.USPeer69177
AS3356Lumen (Level 3)USPeer25677
AS3754NYSERNetUSPeer282
AS3630NYSERNetUSPeer121

Prefixes

All 28

The largest blocks AS1204 originates, widest first.

Largest prefixes originated by AS1204
PrefixAddressesVisibility
141.254.0.0/1732.8k76/77
136.223.192.0/1816.4k76/77
136.223.128.0/198.2k76/77
136.223.128.0/204.1k77/77
136.223.144.0/204.1k77/77
136.223.160.0/204.1k76/77
136.223.120.0/212k76/77
136.223.116.0/221k76/77
141.254.120.0/221k76/77
136.223.164.0/2351277/77

Routing health

How AS1204's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid0.0%0
  • Invalid0.0%0
  • No ROA100.0%28

Propagation

  • Globally propagated90% of full-feed peers or more100.0%28
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 28 prefixes

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

  • Withdrawn136.150.104.0/2422nd Oct 2026

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.