AS67

AS67 is a legacy allocation registered under ARIN to Unisys Corporation (org UNISYS-2, Blue Bell, PA), the corporate successor to System Development Corporation (SDC), the SAGE software pioneer that RFC 1020 (1987) recorded under the handle "SDC-PRC-AS" — a handle the ASName still carries. The succession is documented: SDC was sold to Burroughs Corporation in 1980; Burroughs merged with Sperry in 1986 to form Unisys, and SDC was folded into Unisys Defense Systems (a 1988 Unisys FCC filing dates the formal merger of SDC into Unisys to September 30, 1987). So the current holder is the corporate successor to SDC, not a clean change of hands. The ASN is dormant: it is not visible in the global routing table and originates zero prefixes; Unisys routes actively via a different ASN (AS6072), not AS67. The ARIN ASN RegDate is 1986-04-03 (the UNISYS-2 org record was last updated 2026-01-06, so the registration is actively maintained). For triage, treat AS67 as a registered-but-dormant legacy corporate number. No notable public abuse signal was found as of June 2026.

Operator

Unisys Corporation (ARIN OrgId UNISYS-2, Blue Bell, PA 19422) [Confirmed] — ARIN RDAP. Corporate successor to System Development Corporation (SDC).

Country / RIR

US, ARIN [Confirmed]

Allocated

ARIN ASN RegDate 1986-04-03 (updated 2012-06-01; org UNISYS-2 last updated 2026-01-06, actively maintained) [Confirmed]

Org status

registered but dormant (org actively maintained)

Security/abuse context (NEUTRAL, DATED)

dormant/not announcing; no abuse signal as of 2026-06-08 — IPinfo

Network & routing

Network type

enterprise / legacy corporate [Confirmed]

Size

dormant — 0 prefixes; not visible in the routing table — IPinfo / ipgeolocation.io (2026-06)

Routing/peering

none — no peers or upstreams; Unisys routes actively via AS6072, not AS67; RPKI n/a — IPinfo

Notable usage

[historical, RFC 1020] AS67 "SDC-PRC-AS" = System Development Corporation (SAGE software pioneer). [current] Unisys Corporation, via SDC → Burroughs (1980) → Unisys (1986; SDC folded into Unisys, formal merger 1987-09-30) — unisys.com

Related ASNs

AS6072 (Unisys — current active routing) [Confirmed]

Analyst note

A registered-but-dormant legacy corporate number; the holder is the corporate successor to SDC (via Burroughs → Unisys), and live Unisys routing is on AS6072, not AS67.