USAS100
Operated by FMC Central Engineering Laboratories, US.
Summary
- // analyst note
- Worth closer triage attention — a 1987 legacy number originating mostly IRR/RPKI-invalid prefixes labeled for unrelated entities. Observations are point-in-time (2026-06-09); re-check at publish time.
- // security note
- NEUTRAL/DATED: as of 2026-06-09 — 1 RPKI-invalid (ROA-signed) prefix and 6 IRR-invalid third-party-labeled origins; a pattern that can indicate loose origination practices rather than a single coherent operator.
About this ASN.
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.
What this network routes.
- 12.30.153.0/24
- 192.118.48.0/24
- 38.22.219.0/24
- 74.123.89.0/24
Who it talks to.
Neighbours observed by RouteViews at 2026-09-20, lowest ASN first. Relationships are inferences from the CAIDA AS Relationships Dataset, 2026-08-01, and establish no commercial arrangement; a dash means the inference did not resolve.
| ASN | Operator | Role |
|---|---|---|
| AS16158 | — | upstream |
| AS40620 | — | upstream |
| AS46197 | — | upstream |
| AS401769 | — | upstream |