AS276

AS276 is a legacy autonomous system number registered under ARIN to The University of Texas System, operated by its Office of Telecommunication Services (OTS) in Austin, Texas. OTS administers the Texas Higher Education Network (THEnet) and the UT System Network backbone, carrying Internet and research-network connectivity for the UT System's academic and health institutions and other Texas education and government entities. The practical triage point for AS276 is that it is effectively dormant in today's routing table: RIPEstat shows zero currently announced IPv4 and IPv6 prefixes, with very low visibility (8 of 327 RIS peers for v4, 0 of 322 for v6) and roughly 12 observed neighbours. The only prefix ever seen originating from AS276 is 192.88.12.0/24, observed from 2003-07-19 until 2025-12-14 and now withdrawn. CAIDA AS Rank, customer-cone, and RPKI data could not be retrieved at research time (the CAIDA endpoint returned HTTP 502), so those fields stay Unknown rather than fabricated. Operational Internet routing for UT institutions is carried under other ASNs, leaving AS276 as an administrative/legacy record. No notable public abuse signal was found as of June 2026: AS276 is absent from Spamhaus ASN-DROP and the ipapi.is most-abusive list, and no NANOG-archive abuse threads reference it. One unsubstantiated "announces bogons" flag at bgp.he.net is noted but uncorroborated by threat feeds.

Operator

The University of Texas System — Office of Telecommunication Services (OTS), Austin, TX (ARIN org handle UTS-2; network handle OTS-AS-276) [Confirmed] — ARIN RDAP, utsystem.edu

Country / RIR

US (Austin, Texas), ARIN [Confirmed] — ARIN RDAP autnum

Allocated

2001-05-08 (ARIN registry date, NOT an IEEE date — IEEE publishes no ASN registration dates); last changed 2012-03-02 [Confirmed] — ARIN RDAP autnum top-level events

Org status

public state university system (Texas state government entity); The University of Texas System comprises academic and health member institutions across Texas [Confirmed] — utsystem.edu

Contacts

abuse@the.net (ABUSE3227-ARIN); tech-contact@ots.utsystem.edu (NOC, ZU82-ARIN); admin-contact@ots.utsystem.edu (NAC25-ARIN); +1-512-471-8530; Office of Telecommunication Services, P.O. Box 7580, Austin, TX 78713-7580, US [Confirmed] — ARIN RDAP entities

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-21 — absent from Spamhaus ASN-DROP (full 430-entry list checked), absent from ipapi.is most-abusive top-1000, no NANOG-archive abuse threads; one unconfirmed "announces bogons" flag at bgp.he.net; AbuseIPDB and CleanTalk lookups returned HTTP 403 (Unknown, not cleared)

Network & routing

Network type

education / higher-education research network; AS276 backs THEnet / UT System Network but is legacy/inactive in current routing [Confirmed for role; Likely for "inactive"] — utsystem.edu/offices/telecommunication-services, bgp.tools/as/276

Size

dormant — 0 currently announced IPv4 prefixes / 0 addresses and 0 IPv6 prefixes; only historical prefix 192.88.12.0/24 (256 addresses, withdrawn, last seen 2025-12-14) [Confirmed] — RIPEstat routing-status / announced-prefixes (2026-06)

Routing/peering

NOT currently announced — v4 visibility 8/327 RIS peers, v6 0/322; ~12 observed neighbours; no public peering policy and no IXP memberships listed on PeeringDB (org/profile present, RIR status ok, last updated 2026-03) [Confirmed for visibility/no IXP; Likely for "no policy"] — RIPEstat routing-status, peeringdb.com/asn/276

Upstreams / peers / AS rank / customer cone

Unknown — CAIDA AS Rank API returned HTTP 502; no transit, peer enumeration, rank, or cone data retrievable, and with no active announcements transit is not derivable from routing tables [Unknown] — CAIDA unavailable

RPKI

Unknown — no ROA/RPKI data returned for AS276; with no active prefix announcements, ROA coverage is moot for current routing [Unknown]

Notable usage

AS276 (OTS-AS-276) is registered to UT System OTS, which manages THEnet and the UT System Network backbone. It currently originates 0 prefixes publicly; the abuse contact routes through the.net (abuse@the.net), reflecting OTS's THEnet relationship. Active UT-institution Internet routing runs under other ASNs

[Likely] — bgp.tools/as/276, ipinfo.io/AS276, ARIN RDAP

Analyst note

Encountered as a dormant legacy ASN registered to a public university system; WHOIS/RDAP resolves cleanly to UT System OTS, but live routing shows zero current originations. Clean, inactive ASN. CAIDA-derived rank/cone/RPKI unverifiable at research time (HTTP 502).