AS757

AS757 is a dormant legacy autonomous system registered under ARIN to Merit Network, Inc. that currently announces zero IPv4 and zero IPv6 prefixes — live production routing for Merit runs under AS237, not AS757.

Merit Network is a Michigan-based nonprofit research-and-education (R&E) network, founded in 1966 by Michigan State University and Wayne State University, and historically notable as the operator of the NSFNET backbone from 1987 to April 1995 under NSF funding. AS757 carries the ARIN RIR name MERIT-AS-23, a naming pattern consistent with a block of sequential MERIT-AS-## ASNs Merit received around 1990; ARIN RDAP records the autnum's top-level registration event as 1990-10-08, with a later "last changed" event dated 2012-04-02.

Both bgp.he.net and bgp.tools independently show AS757 with zero announced IPv4/IPv6 prefixes and zero observed BGP peers at the time of lookup, despite an Active/Allocated status held continuously since 1990. bgp.tools explicitly flags it as not currently present in the global routing table. CAIDA AS-rank places AS757 at 79,459 with a customer cone of just itself — 1 ASN / 0 prefixes / 0 addresses — and zero topology degree, consistent with an ASN with no observed routing activity.

Merit itself remains an active, independent nonprofit corporation governed by Michigan's public universities, and it operates a currently-routed production ASN (AS237, confirmed via PeeringDB org 31248) offering members Layer-3 peering at roughly 10 Gbps or more plus Internet2 Peer Exchange access. No AS757-specific peering policy document was found; Merit's published peering-service description is organization-level and not confirmed to apply to this particular, non-announcing ASN.

Operator

Merit Network, Inc. (nonprofit R&E network; ARIN handle MERIT-AS-23, Ann Arbor, MI) [Confirmed] — ARIN RDAP (rdap.arin.net/registry/autnum/757), merit.edu/about/

Country / RIR

US, ARIN [Confirmed] — ARIN RDAP autnum record

Allocated

1990-10-08 (ARIN RDAP autnum top-level "registration" event) [Confirmed]; last changed 2012-04-02 (top-level "last changed" event) [Confirmed] — https://rdap.arin.net/registry/autnum/757

Org status

active independent nonprofit corporation (Merit Network, Inc.), governed by Michigan's public universities, founded 1966 [Confirmed]; AS757 itself is operationally dormant — merit.edu/about/, merit.edu/about/history/

Contacts

abuse@merit.edu, +1-734-527-5740; HQ 880 Technology Drive, Suite B, Ann Arbor, MI 48108 [Confirmed] — ARIN RDAP autnum record

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-28 — not surfaced in Spamhaus resource-hub search, general blacklist/abuse-feed search, or NANOG/seclists archive search; dormant ASN under a respected R&E operator

Network & routing

Network type

regional research-and-education (R&E) network operator; AS757 is legacy/dormant (Merit's active production network runs under AS237) [Confirmed] — merit.edu/about/, bgp.he.net/AS757, peeringdb.com/net/928

Size

dormant — 0 IPv4 prefixes / 0 IPv6 prefixes, 0 observed BGP peers; CAIDA AS-rank 79,459 with a customer cone of 1 ASN / 0 prefixes / 0 addresses (self only) and asnDegree total 0 [Confirmed] — bgp.he.net/AS757, bgp.tools/as/757 (2026-07), CAIDA AS-rank API (api.asrank.caida.org)

Routing/peering

NOT announced — 0 prefixes and 0 peers observed on bgp.he.net and bgp.tools; no upstreams or peers listed [Confirmed]. No AS757-specific peering policy found; Merit's general member peering (~10 Gbps+ L3, I2PX) is org-level and not confirmed AS757-specific [Likely]

RPKI

not assessable — AS757 announces no prefixes, so there are no ROAs to validate [Confirmed]

Notable usage

Merit Network operated the NSFNET backbone (1987–1995) and is one of three founding partners (1966, with Michigan State University and Wayne State University) of Michigan's R&E network. AS757 (MERIT-AS-23) is an early/legacy Merit ASN with no current routed usage of its own; Merit's active infrastructure runs under AS237 — merit.edu/about/history/, en.wikipedia.org/wiki/Merit_Network

Related ASNs

AS237 (Merit's active, currently-announcing production ASN, confirmed via PeeringDB org 31248) [Confirmed]

Analyst note

Encountered as a dormant legacy ASN registered to Merit Network under the RIR name MERIT-AS-23. WHOIS/RDAP resolves cleanly to Merit, but live routing runs under AS237, not AS757. No abuse signal; clean, inactive ASN.