AS100

AS100 is a legacy allocation registered under ARIN to FMC Central Engineering Laboratories (OrgId FCEL, 1205 Coleman Avenue, Santa Clara, CA), carrying the handle "FMC-CTC" — an original 1987 corporate allocation tied to FMC's central engineering labs. The ARIN ASN RegDate is 1987-02-26 (ASN record updated 1991-01-10; org record updated 2012-10-10). Its current routing deserves triage attention: as of 2026-06-09, bgp.he.net shows AS100 originating exactly 7 IPv4 prefixes (~1,792 addresses, 0 IPv6) with 7 observed BGP peers — but 6 of the 7 prefixes are IRR/RPKI-invalid and labeled for unrelated entities (Discovery Information Technologies, Trinity Petroleum Management, QIAGEN Redwood City, Fibre Sourcing Botswana, Comverse Network Systems, Prodege LLC), and the single ROA-signed origin (199.36.118.0/24, Intellicom Computer Consulting) is RPKI-invalid. The observed peers are small, diverse networks. This heterogeneous, mostly-invalid prefix set is a pattern that can indicate loose origination practices rather than a single coherent operator — stated neutrally and dated, with re-checks recommended since such observations change. No other notable public abuse signal was found as of June 2026.

Operator

FMC Central Engineering Laboratories (ARIN OrgId FCEL, Santa Clara, CA) [Confirmed] — ARIN RDAP

Country / RIR

US, ARIN [Confirmed]

Allocated

ARIN ASN RegDate 1987-02-26 (ASN record updated 1991-01-10; org record updated 2012-10-10) [Confirmed]

Org status

active registration; small heterogeneous routing footprint

Security/abuse context (NEUTRAL, DATED)

as of 2026-06-09 — 1 RPKI-invalid (ROA-signed) prefix and 6 IRR-invalid origins labeled for unrelated entities; a pattern that can indicate loose origination practices; no other notable public abuse signal — bgp.he.net

Network & routing

Network type

enterprise / legacy [Confirmed]

Size

7 IPv4 prefixes (~1,792 addrs), 0 IPv6; 7 observed BGP peers — bgp.he.net (2026-06-09)

Routing/peering

active but anomalous — 6 of 7 prefixes IRR/RPKI-invalid and labeled for unrelated entities; 1 ROA-signed origin (199.36.118.0/24) RPKI-INVALID; peers small/diverse (e.g. AS16158 Mavenir, AS46197, AS46301, AS329381) — bgp.he.net

Notable usage

[historical, Confirmed] An original 1987 corporate allocation tied to FMC's central engineering laboratories (FMC-CTC). [current] originates a small heterogeneous prefix set largely labeled for third parties — bgp.he.net

Related ASNs

none specifically confirmed for this profile

Analyst note

Worth closer triage attention — a 1987 legacy number originating mostly IRR/RPKI-invalid prefixes labeled for unrelated entities. Re-check at publish time; these observations change.