subnet.im

AS557University of Maine System

United StatesRegistryARINTypeEyeball

As of 24th October 2026, AS557 (University of Maine System), an access network registered in the United States with ARIN, originates 17 IPv4 prefixes covering 293k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 991st-largest of the 79,642 networks we see originating IPv4, and the 259th-largest of 18,487 in the United States. It is seen behind 5 upstream networks, most often AS6939 (Hurricane Electric LLC) and AS174 (Cogent Communications, LLC), and in front of 5 downstream networks. 78% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

17

IPv6 prefixes

1

IPv4 addresses

293k

IPv6 /64s

4.3B

Upstream graph

The networks AS557 is seen behind, one and two hops out, drawn from real AS paths.

AS557Toward the internet core
Upstream graph for AS557: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS557University of Mai…This networkAS174Cogent Communicat…AS6939Hurricane Electri…AS11164Internet2 I2PXAS11537Internet2AS13536FirstLight Networ…AS151326DCConnect Communi…AS20130Depaul UniversityAS132337AxclusiveAS1299Arelion (fka. Tel…AS293ESnetAS2153CENICAS3770FirstLight Networ…

Networks observed one and two hops upstream of AS557 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

21

adjacent networks

Upstreams
524%
Peers
1152%
Downstreams
524%

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

Upstreams of AS557
NetworkCountryRelationshipPathsVantage pts
AS6939Hurricane Electric LLCUSPeer2,065119
AS174Cogent Communications, LLCUSPeer48872
AS13536FirstLight Networks, LLCUSPeer8546
AS11537Internet2USPeer662
AS11164Internet2 I2PXUSPeer105

Prefixes

The largest blocks AS557 originates, widest first.

Largest prefixes originated by AS557
PrefixAddressesVisibility
130.111.0.0/1665.5k76/76
141.114.0.0/1665.5k76/76
169.244.0.0/1665.5k76/76
204.197.0.0/1732.8k76/76
64.45.64.0/1816.4k76/76
65.18.0.0/1816.4k76/76
65.18.64.0/198.2k76/76
207.166.224.0/198.2k76/76
209.222.192.0/198.2k76/76
65.18.96.0/204.1k76/76

Routing health

How AS557'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

  • Valid77.8%14
  • Invalid0.0%0
  • No ROA22.2%4

Propagation

  • Globally propagated90% of full-feed peers or more100.0%18
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 17 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 24th Sept 2026.

No announcement by AS557 started or stopped in this period.

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