AS561

AS561 is a legacy autonomous system number registered under ARIN to HP Inc., the personal-systems and printing company headquartered at 1501 Page Mill Rd, Palo Alto, CA. The autnum's own top-level RDAP registration event dates to 1990-01-01, decades before HP Inc.'s 2015 split from Hewlett-Packard Company, making AS561 one of the older numbers in ARIN's original 16-bit block (1–1876). The registry short-name HPINC-ASIAPAC and the registrant entity "HP Inc." both point to the same modern HP Inc. corporate umbrella; the nested HPINC-Z org record and HIA8-ARIN contact record carry their own later entity-level dates (2016–2017, 2025) which are administrative/contact-record timestamps, not the ASN's allocation date, and are excluded here. Operationally AS561 is fully dormant: RIPEstat, Hurricane Electric, and CAIDA all agree it announces zero IPv4 and zero IPv6 prefixes today, with zero visible peers or upstreams, and no PeeringDB record exists. Historical BGP data shows it last originated a prefix (192.103.141.0/24) in November 2002, having first appeared with 129.213.0.0/16 in August 2000 — consistent with an enterprise ASN retired from active routing over two decades ago. No abuse signal was found on Spamhaus ASN-DROP or in NANOG archives as of query date. A web-search claim that AS561/562/563 originated as "3COM-A/B/C" before passing to HP could not be confirmed against any primary RIR source and is recorded here as unverified, not fact.

Operator

HP Inc. (registrant entity "HP Inc."; registry short-name HPINC-ASIAPAC; HQ 1501 Page Mill Rd, Palo Alto, CA 94304, US) [Confirmed] — https://rdap.arin.net/registry/autnum/561

Country / RIR

US, ARIN [Confirmed] — https://rdap.arin.net/registry/autnum/561

Allocated

1990-01-01 (ARIN RDAP autnum top-level "registration" event, NOT an IEEE date); last changed 2025-09-03 [Confirmed] — https://rdap.arin.net/registry/autnum/561

Org status

ARIN RDAP registration status "active" (record in good standing), though operationally the ASN has not announced routes since 2002 [Confirmed] — https://rdap.arin.net/registry/autnum/561

Contacts

IPAdmin@hp.com — the role mailbox of the "HP Inc IP Admin" group POC (HIA8-ARIN; abuse/technical/administrative); an individual staff mailbox also listed on that record is not reproduced here [Confirmed] — https://rdap.arin.net/registry/autnum/561

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-07-11 — not on Spamhaus ASN-DROP (checked live), no AS561-specific NANOG/Full-Disclosure hijack thread found

Network & routing

Network type

enterprise/corporate end-user ASN (not a transit ISP or IXP participant); currently dormant/unrouted [Confirmed] — https://bgp.he.net/AS561, https://ipinfo.io/AS561

Size

0 IPv4 prefixes / 0 addresses, 0 IPv6 prefixes currently announced; customer cone = 1 ASN (itself), 0 prefixes, 0 addresses [Confirmed] — https://stat.ripe.net/AS561, https://asrank.caida.org/asns/561

Routing/peering

NOT announced — 0/327 RIS peers see it in v4, 0/322 in v6; CAIDA asnDegree total/customer/peer/provider = 0/0/0/0; no PeeringDB record (asn/561 → 404) [Confirmed] — https://stat.ripe.net/AS561, https://www.peeringdb.com/asn/561

RPKI

not assessable — no announced prefixes, so no ROAs exist to validate [Confirmed] — https://stat.ripe.net/AS561

Historical routing window

first seen originating 129.213.0.0/16 on 2000-08-18; last seen originating 192.103.141.0/24 on 2002-11-10; no announcements observed since [Confirmed] — https://stat.ripe.net/AS561

Notable usage

none identifiable currently given zero routed prefixes; HP Inc. separately holds at least AS562 and AS563 under the same "HPINC" registry label per the live AS-names list [Likely] — https://bgp.potaroo.net/cidr/autnums.html

Related ASNs

AS562, AS563 (also registered under the "HPINC" short-name per the live bgp.potaroo.net AS-names table) [Likely] — https://bgp.potaroo.net/cidr/autnums.html

Unverified claim

a web-search summary asserted AS561/562/563 were originally "3COM-A/B/C" before passing to HP; no primary RIR source corroborates this and it is recorded as Unknown, not fact [Unknown] — https://rdap.arin.net/registry/autnum/561