AS78

AS78 is a legacy 16-bit allocation registered under ARIN to BT Americas, Inc., carrying the canonical handle "BA-346-78." The ASN was registered on 2000-10-28 per the ARIN whois ASNumber RegDate field. RFC 1020 (1987) labeled this number "SSDF-CDC-GW," tied to Control Data Corporation (CDC); a later 1990s AS-name archive shows it as "SYNTEGRA — Syntegra (USA), Inc.," the BT-owned IT-services firm descended from Control Data Systems. The lineage CDC → Control Data Systems → Syntegra → BT is coherent, and the current registry holder is BT Americas (OrgId BA-346). AS78 is actively routing as of 2026-06-19: RIPEstat routing-status confirms 3 IPv4 prefixes (192.5.209.0/24, 192.5.212.0/24, 192.100.153.0/24) covering approximately 768 IPv4 addresses, with full visibility across all 327 RIS full-feed peers and last-seen timestamp of 2026-06-19. No IPv6 prefixes are announced. BT Americas' broader live operational routing also runs under AS19812 (RADIANZ Americas), but AS78 itself is an active originator. Qrator Radar shows zero route leaks, loops, bogons, and amplifiers in its dataset. No notable public abuse signal was found as of June 2026.

Operator

BT Americas, Inc. (Confirmed) — ARIN whois (ASNumber record, source ARIN) / Potaroo. Successor via Control Data → Control Data Systems → Syntegra → BT.

Country / RIR

US, ARIN [Confirmed]

Allocated

2000-10-28 [Confirmed] — ARIN whois ASNumber RegDate field (source ARIN, rdap.arin.net/registry/autnum/78)

Org status

active holder, active ASN

Security/abuse context (NEUTRAL, DATED)

Qrator Radar shows 0 leaks/loops/bogons/amplifiers; no notable public abuse signal found as of 2026-06-19 — radar.qrator.net

Network & routing

Network type

enterprise / legacy (telecom / IT services) [Confirmed]

Size

active — 3 IPv4 prefixes, ~768 IPs — RIPEstat routing-status (2026-06-19)

Routing/peering

actively announcing 3 IPv4 /24 prefixes (192.5.209.0/24, 192.5.212.0/24, 192.100.153.0/24); full visibility 327/327 RIS peers; 1 observed BGP neighbour; no IPv6; RPKI status unknown — stat.ripe.net (2026-06-19)

Notable usage

[historical, RFC 1020] AS78 "SSDF-CDC-GW" (Control Data Corp); later "SYNTEGRA — Syntegra (USA), Inc." [current] BT Americas, Inc. — bt.com

Related ASNs

AS19812 (RADIANZ Americas / BT Americas — broader live routing) [Confirmed]

Analyst note

A legacy corporate number with a telecom lineage; AS78 itself is actively originating 3 IPv4 /24 prefixes as of 2026-06-19. BT's broader routing also runs on AS19812. Allocation date confirmed 2000-10-28 from ARIN ASNumber RegDate.