AS771

AS771 is a registry-active autonomous system number held by NASA that has announced zero IPv4 and zero IPv6 prefixes since November 2018, making it a dormant ASN despite an unbroken, current ARIN registration record.

ARIN RDAP's top-level autnum events show the ASN was registered on 1990-10-31 and last changed on 2024-12-16, with status "active." The registrant is NASA (org handle NASA-Z), address Office of the Chief Information Officer, Marshall Space Flight Center, Huntsville, AL 35812; an additional administrative contact is listed at NASA Johnson Space Center in Houston, TX.

Routing history shows AS771 originated 11 distinct IPv4 prefixes between 2002 and 2018 (including 128.158.0.0/16 and 138.115.0.0/16) and no IPv6 space at any point. RIPEstat, bgp.he.net, and bgp.tools agree it has not appeared in the global routing table since roughly November 2018. CAIDA AS Rank lists it at 79,459 with seen=false and an empty customer cone (1 ASN, 0 prefixes, 0 addresses) — consistent with a registry-only, operationally inactive ASN.

AS771 has no PeeringDB network object; NASA's PeeringDB organization (org 19499) lists only AS23, AS24, and AS1263, not AS771, and no operator-published peering policy for AS771 was found on nasa.gov. The only observed BGP relationship on record is a single historical peer, AS270, also a NASA-registered ASN. No dedicated nasa.gov page describing AS771 or its historical operating unit (NASA Integrated Services Network / NICS) could be located as a current, first-party source.

Operator

National Aeronautics and Space Administration (NASA); registrant org handle NASA-Z [Confirmed] — ARIN RDAP autnum

Country / RIR

US, ARIN [Confirmed] — ARIN RDAP autnum

Allocated

1990-10-31 (ARIN RDAP autnum top-level registration event, recovered via a direct re-fetch after the primary input's top-level events were truncated); last changed 2024-12-16 [Confirmed] — https://rdap.arin.net/registry/autnum/771

Org status

Active per ARIN RDAP (status: active; last changed 2024-12-16); administrative/technical/abuse/NOC POCs on record, with abuse@nasa.gov and noc@nisn.nasa.gov both flagged by ARIN as "Unvalidated POC" (since 2010 and 2016 respectively) [Confirmed] — ARIN RDAP autnum

Contacts

dns@nasa.gov (DDI Operations); abuse@nasa.gov (NASA Abuse, unvalidated since 2010); noc@nisn.nasa.gov (NISN NOC, org SAIC, unvalidated since 2016) [Confirmed] — ARIN RDAP autnum

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-31; Spamhaus automated check returned HTTP 403 (Unknown, not confirmed clean); Cisco Talos ASN reputation has no record (404); no NANOG-archive or hijack-tracker mentions

Network & routing

Network type

US federal government (NASA) ASN; registry-active but unrouted/dormant in BGP since ~2018-11 [Likely] — RIPEstat routing-status, bgp.he.net, bgp.tools

Size

0 IPv4 prefixes / 0 IPv4 addresses and 0 IPv6 prefixes currently announced; historically 11 distinct IPv4 prefixes (2002–2018), 0 IPv6 ever; customer cone = 1 ASN (itself), 0 prefixes, 0 addresses [Confirmed] — RIPEstat, bgp.he.net, bgp.tools, CAIDA AS Rank (2026)

Routing/peering

NOT currently announced; last seen in the global routing table 2018-11-03; single historical peer AS270 (also NASA), no current peers or upstreams; no PeeringDB network object for AS771 (NASA's PeeringDB org 19499 lists AS23, AS24, AS1263 only) [Confirmed]

RPKI

not assessable — no currently announced prefixes, so no ROAs to validate; no RPKI data shown on bgp.tools [Likely] — bgp.tools, RIPEstat

Notable usage

historically originated 11 IPv4 prefixes for NASA (2002–2018) before going dark; no dedicated operator-official page found describing AS771's historical role; NASA's currently-peering ASNs per PeeringDB are AS23, AS24, and AS1263, not AS771 [Confirmed for routing history; Likely for role interpretation] — bgp.he.net, peeringdb.com/org/19499

Related ASNs

AS270 (historical peer, also NASA); AS23, AS24, AS1263 (NASA's other ASNs per PeeringDB org 19499) [Confirmed]

Analyst note

Encountered as a registry-active but operationally dormant NASA ASN — no BGP visibility since late 2018 across every routing source consulted, and no PeeringDB or operator-official page specific to AS771.