AS144

AS144 is a legacy low-numbered Autonomous System Number registered under ARIN to "Lucent Technologies/Bell Laboratories" (ARIN OrgId LTL-22) at 600 Mountain Avenue, Murray Hill, NJ 07974. The ARIN ASN name is ATT-INTERNET, reflecting its origin in the AT&T Bell Labs era; the underlying registration carries an ARIN database registration date of 1987-12-16, making it one of the earliest ASNs issued. Historically it was used to announce a small block of IPv4 space within 135.104.0.0/16 — bgp.he.net records seven prefixes (a /16 plus several /24s) — for the Bell Labs corporate research network, with AS209 (CenturyLink) as its sole observed upstream. The ASN is administratively still flagged "active" in RDAP, but it is dormant from a routing standpoint: it announces zero IPv4 and zero IPv6 prefixes, RIPE RIS shows 0 of 326 v4 peers and 0 of 320 v6 peers seeing any route, and it has not been visible in the global routing table since roughly November 2018 (last seen prefix 135.104.23.0/24 on 2018-11-06). Corporately, Lucent Technologies no longer exists independently — it merged with Alcatel in 2006 (Alcatel-Lucent), which Nokia acquired in 2016; Bell Labs now operates as Nokia Bell Labs — but the ARIN record (last changed 2012-10-10) was never transferred to Nokia. No notable public abuse signal was found as of 2026-06-14.

Operator

Lucent Technologies/Bell Laboratories (ARIN OrgId LTL-22, 600 Mountain Avenue, Murray Hill, NJ 07974) [Confirmed] — ARIN RDAP https://rdap.arin.net/registry/autnum/144

Country / RIR

US, ARIN [Confirmed] — RDAP / bgp.he.net

AS name

ATT-INTERNET [Confirmed] — RDAP / bgp.he.net

Org status

Lucent Technologies defunct as an independent entity — merged with Alcatel 2006-12-01 (Alcatel-Lucent), acquired by Nokia in 2016; Bell Labs continues as Nokia Bell Labs. ARIN record not transferred to Nokia [Confirmed] — https://en.wikipedia.org/wiki/Lucent_Technologies, ARIN org LTL-22

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-14; not on Spamhaus DROP/ASN-DROP; no hijack/leak or NANOG abuse thread found

Network & routing

Network type

corporate / research network (Bell Labs Murray Hill campus), legacy and now dormant [Likely] — bgp.he.net/AS144, ARIN

Size / routing

dormant — 0 IPv4 and 0 IPv6 prefixes currently announced; 0 of 326 RIS v4 peers and 0 of 320 RIS v6 peers see it; not visible in the global table since ~2018-11 (last seen 135.104.23.0/24 on 2018-11-06; first seen 135.104.0.0/16 on 2000-08-18) [Confirmed] — RIPEstat routing-status; bgp.he.net/AS144

Upstream / peering

AS209 (CenturyLink Communications, LLC) sole observed historical upstream [Likely]; no PeeringDB entry (404), no documented peering policy [Confirmed for absence] — bgp.he.net/AS144, peeringdb.com/asn/144

RPKI

no active RPKI validation applicable (zero prefixes announced); bgp.he.net reports 0 valid / 0 invalid origins [Confirmed] — bgp.he.net/AS144

CAIDA

AS-rank 79,459; cliqueMember false; seen false; customer cone 1 ASN (itself only) [Confirmed] — CAIDA as-rank (canonical JSON)

IX presence

Unknown — no IXP membership documented; CAIDA ixp field null [Unknown]

Notable usage

Bell Labs corporate research network at Murray Hill, NJ; a USENIX LISA '97 paper documents building the Lucent Bell Labs Research network after the 1996 AT&T tri-vestiture [Confirmed] — https://www.usenix.org/conference/lisa-97/creating-network-lucent-bell-labs-research

Related ASNs

AS209 (CenturyLink, historical upstream) [Likely]

Registered

ARIN ASN RegDate 1987-12-16 (an ARIN database registration timestamp, NOT an IEEE/IANA assignment date); ASN record last changed 1996-08-07, org LTL-22 last changed 2012-10-10 [Confirmed for the shown dates] — https://rdap.arin.net/registry/autnum/144

Historical originations

7 IPv4 prefixes within 135.104.0.0/16 (a /16 plus /24s) [Confirmed] — bgp.he.net/AS144

Analyst note

Administratively active but a dormant legacy ASN; WHOIS still resolves to Lucent/Bell Labs, not Nokia. The ARIN abuse POC — an individual mailbox on a Bell Labs domain, in the RDAP record — has been unvalidated since 2010.