AS151

AS151 is an early, low-numbered ARIN Autonomous System Number registered to HP Inc., the publicly traded technology company (NYSE: HPQ) headquartered at 1501 Page Mill Rd, Palo Alto, CA 94304. HP Inc. is the personal-systems-and-print company that resulted from the November 2015 split of the original Hewlett-Packard Company into HP Inc. and Hewlett Packard Enterprise, so this ASN traces back to the legacy Hewlett-Packard corporate network. The registry name is HPINC-EMEA, and the ARIN org handle is HPINC-Z; the administrative and abuse contact is HP Inc IP Admin (IPAdmin@hp.com). In practical routing terms AS151 is dormant: as of June 2026 it announces zero IPv4 and zero IPv6 prefixes, is seen by 0 of 327 IPv4 RIS peers and 0 of 319 IPv6 RIS peers, and CAIDA reports a connectivity rank of 79,459 with all degree dimensions at zero and seen=false. RIPEstat shows the ASN was visible in the global routing table historically — first seen 2000-08-18 (128.88.110.0/24) and last seen 2022-03-31 (192.170.48.0/22) — and bgp.he.net independently places the withdrawal around 2022-04-21. The sole historically observed BGP neighbour was AS7430 (also HP Inc.), indicating AS151 operated as an internal sibling AS rather than an externally peered transit network. No public abuse signal, blocklist entry, or routing-security incident surfaced in any open threat feed as of 2026-06-15 — consistent with a corporate-held legacy ASN that currently originates no routable address space. This is best characterized as a clean, dormant legacy corporate ASN held by a major vendor.

Operator

HP Inc. (publicly traded technology company, NYSE: HPQ), 1501 Page Mill Rd, Palo Alto, CA 94304, United States; ARIN OrgId HPINC-Z [Confirmed] — ARIN RDAP (https://rdap.arin.net/registry/autnum/151); whois.arin.net/rest/asn/AS151

Country / RIR

US, ARIN [Confirmed] — ARIN RDAP / CAIDA (country.iso=US)

AS name

HPINC-EMEA [Confirmed] — ARIN RDAP (name=HPINC-EMEA). The "EMEA" string implies a historical EMEA operational scope, but no active prefixes exist to confirm current geographic use [Likely] — bgp.tools/as/151. (One web source describes a legacy "Hewlett-Packard Asia-Pacific zone" per RADB; this conflicts with the EMEA registry name and is single-source, so the regional designation is treated as Unknown — bgp.he.net/AS151)

Allocated

ARIN autnum RegDate 1988-01-04; ASN last changed 2025-09-03 [Confirmed for the shown dates] — ARIN RDAP autnum events. The 1988-01-04 value is an ARIN registry artifact (not IEEE-published, and IEEE publishes no ASN dates); early registry records of this era may have been backfilled, so it should not be presented as a verified founding/assignment date

[Likely] — ARIN RDAP

Org status

active holder — HP Inc. is an active, publicly traded Delaware-incorporated corporation; the ARIN record is active (last changed 2025-09-03) though the AS itself is dormant in BGP [Confirmed] — ARIN RDAP; dnb.com (HP Inc. profile)

Website

https://www.hp.com [Confirmed] — ip2location.com/as151; ARIN RDAP contact domain (hp.com)

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-15; no Spamhaus ASN-DROP/SBL, AbuseIPDB, Blocklist.de, NANOG, or routing-incident records surfaced — a dormant ASN with 0 prefixes presents no active traffic surface to classify [Confirmed for null; individual feed lookups Unknown] — bgp.he.net/AS151; radar.cloudflare.com/routing/as151; spamhaus.org

Network & routing

Network type

corporate/enterprise network (legacy), not a commercial ISP; currently dormant in BGP [Confirmed] — ARIN RDAP registrant; bgp.he.net/AS151

Size / routing

0 IPv4 prefixes, 0 IPv6 prefixes, 0 addresses announced; not visible to any RIS peer (0/327 v4, 0/319 v6) [Confirmed] — RIPEstat routing-status (resource=151); bgp.he.net/AS151; bgp.tools/as/151

Peering / transit

no current upstreams, peers, or customers (CAIDA asnDegree all 0; RIPEstat observed_neighbours=0); cone = 1 ASN / 0 prefixes / 0 addresses [Confirmed] — CAIDA AS Rank (asn=151); RIPEstat routing-status. Sole historically observed BGP neighbour was AS7430 (HP Inc.), a sibling/internal AS, not a current external transit relationship

[Likely] — bgp.he.net/AS151

Peering policy

PeeringDB lists "Open" (Contract: Not Required; Ratio: None; no public IX presence) — a legacy entry that is effectively inactive given zero announced prefixes [Confirmed for the listing] — peeringdb.com/asn/151

RPKI

indeterminate — no prefixes currently announced, so no ROAs to validate (RIPEstat RPKI validation skipped for lack of a prefix; bgp.he.net reports 0 valid / 0 invalid origins) [Unknown] — canonical ripestat.rpki-validation.skipped; bgp.he.net/AS151

CAIDA rank

79,459; cliqueMember=false; seen=false; lon/lat reported as 0/0 (uninitialised fields, not real coordinates) [Confirmed] — CAIDA AS Rank (asn=151)

Routing history

first seen 2000-08-18 (128.88.110.0/24); last seen 2022-03-31 (192.170.48.0/22); bgp.he.net places withdrawal ~2022-04-21 [Confirmed] — RIPEstat routing-status (resource=151); bgp.he.net/AS151

Notable usage

dormant legacy ASN; appears to have operated as an internal HP sub-AS and has not been visible in the global routing table since 2022 [Confirmed for inactivity] — bgp.he.net/AS151; ip2location.com/as151

Related ASNs

AS7430 (HP Inc.) — sole historically observed neighbour, used internally [Likely] — bgp.he.net/AS151

Historic originations

bgp.he.net records ~10 IPv4 prefixes historically originated, including HP legacy ranges (e.g., 16.131.132.0/24, 16.186.192.0/18) flagged by HE due to HP's historic 16.0.0.0/8 block, plus 192.170.48.0/22 [Likely] — bgp.he.net/AS151

Administrative/abuse contact

HP Inc IP Admin (POC handle HIA8-ARIN), IPAdmin@hp.com, +1-650-857-1501 (HP corporate line); a named individual's mailbox also appears on the record and is in the ARIN RDAP data; ARIN POC status "validated" [Confirmed] — ARIN RDAP; RIPEstat abuse-contact-finder

IRR presence

referenced in AS-SETs across RIPE, RADB, JPIRR, APNIC, LEVEL3, and NTTCOM IRR databases, suggesting retained policy definitions despite operational withdrawal [Likely] — bgp.tools/as/151

Community mentions

none found in NANOG archives, Reddit r/networking, or BGP incident databases [Unknown] — archive.nanog.org; seclists.org/nanog

Analyst note

clean, dormant legacy corporate ASN held by HP Inc. WHOIS resolves to HP Inc. (Palo Alto). No current routable footprint, no abuse history; registry record actively maintained. Regional designation (EMEA per registry vs Asia-Pacific per one third-party source) is conflicting and unresolved.