AS61

AS61 is a legacy ARIN-region allocation whose AS name still reads "DEC-MARLBORO-AS" — Digital Equipment Corporation's Marlboro, Massachusetts site — but whose current registered holder is Air Force Systems Networking (org 7ESG, Maxwell AFB / Gunter Annex, AL). The ASName "DEC-MARLBORO-AS" is confirmed live via RIPEstat whois API (source ARIN, 2026-06-19). This is the clearest historical-versus-current split in the block: the handle reflects 1980s DEC folklore, while the live registry holder is the U.S. Air Force. The ARIN RegDate for AS61 is 1986-02-18, confirmed live via RIPEstat whois API. Potaroo's legacy-autnums mirror corroborates the original "DEC-MARLBORO-AS — Digital Equipment Corporation" label, and AS61 is listed first in Air Force Systems Networking's large multi-hundred-ASN pool (sibling AS65 shares the same Maxwell AFB org record). Routing status is confirmed dormant: RIPEstat routing-status shows 0 announced prefixes (0 of 327 RIS peers seeing any routes) as of 2026-06-19, with no first_seen or last_seen data in RIS — meaning the ASN has never been observed announcing routes in the RIPEstat RIS dataset. For triage, do not attribute AS61 to Digital Equipment Corporation on the public page — the live holder is the U.S. Air Force — and record this ASN as confirmed dormant. No notable public abuse signal was found as of June 2026.

Operator (current)

Air Force Systems Networking (ARIN OrgId 7ESG, Maxwell AFB, AL 36114) [Confirmed via ARIN whois — RIPEstat whois API 2026-06-19]. NOT Digital Equipment Corporation.

Country / RIR

US, ARIN [Confirmed]

Allocated

1986-02-18 [Confirmed — ARIN whois RegDate via RIPEstat whois API 2026-06-19]

Org status

active org / ASN confirmed dormant (0 prefixes, no RIS routing history as of 2026-06-19)

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-19 — Potaroo

Network & routing

Network type

government / military (U.S. Air Force) [Confirmed]

Size

DORMANT — 0 announced prefixes (0/327 RIS peers); no RIS routing history found [Confirmed — RIPEstat routing-status 2026-06-19]

Routing/peering

CONFIRMED DORMANT (0 prefixes, no RIS first/last-seen record); RPKI unknown

Notable usage

[historical] AS name "DEC-MARLBORO-AS" = Digital Equipment Corporation, Marlboro, MA (ASName confirmed live via ARIN whois). [current] registered to Air Force Systems Networking (OrgId 7ESG, Maxwell AFB / Gunter Annex, AL 36114), which holds a large multi-hundred-ASN pool — ARIN whois (RIPEstat 2026-06-19)

Related ASNs

Air Force Systems Networking pool (OrgId 7ESG), e.g., sibling AS65 (same Maxwell AFB org) [Confirmed]

Analyst note

The single most "gotcha" entry — the DEC name is historical folklore; the live registry holder is the U.S. Air Force. ASName "DEC-MARLBORO-AS" confirmed via live ARIN whois. Allocated 1986-02-18; confirmed dormant (never seen in RIPEstat RIS dataset).