AS892

AS892 is an active enterprise autonomous system registered to Emergent BioSolutions Inc., a NYSE-listed biodefense and biopharmaceutical company, and it originates a single stably-routed IPv4 prefix rather than functioning as a transit, hosting, or IXP-facing network.

ARIN RDAP shows the autnum registered as EBSI-ISP-FO-01 under org handle EB-241, with a top-level registration event dated 2022-06-07 and an identical last-changed timestamp, so no later modification is recorded. AS892 is a low-numbered ASN, and ARIN's RDAP exposes no earlier event, so whether 2022-06-07 reflects the ASN's original issuance or a later re-registration to the current holder cannot be resolved from available records.

The routing footprint is narrow and consistent: a single /24, 38.68.74.0/24 (256 addresses), first seen announced 2022-08-31 and visible to all 327 RIPE RIS IPv4 peers as of an August 2026 query, with no IPv6 announced. CAIDA infers two upstream providers (asnDegree provider=2, peer=0, customer=0) against a single RIPEstat-observed neighbour — a methodology discrepancy — with AS174 (Cogent Communications) the consistently observed upstream across sources. This is a single-homed-to-lightly-multihomed corporate profile, not an ISP.

Emergent BioSolutions is headquartered in Gaithersburg, Maryland and develops vaccines, antibody therapeutics, and medical countermeasures, including the BioThrax anthrax vaccine and Narcan naloxone products. No evidence was found of AS892 hosting public-facing services; the single-prefix, single-upstream footprint is consistent with internal corporate infrastructure only.

CAIDA ranks AS892 50,119 globally with a customer cone of 1 ASN, 2 prefixes, and 512 addresses. No published peering policy was found on the operator's site, and no IXP membership was confirmed or ruled out.

Operator

Emergent BioSolutions Inc. (ARIN org handle EB-241; NYSE: EBS) [Confirmed] — rdap.arin.net/registry/autnum/892, whois.arin.net/rest/org/EB-241

Country / RIR

US, ARIN [Confirmed] — rdap.arin.net/registry/autnum/892

Allocated

2022-06-07 (ARIN RDAP autnum top-level registration event; identical last-changed timestamp) [Confirmed] — rdap.arin.net/registry/autnum/892

Org status

active; ARIN RDAP autnum status "Active"; registrant is a publicly traded, operating company [Confirmed] — rdap.arin.net/registry/autnum/892

Contacts

abuse/administrative/technical POC on file is an individual contact at Emergent BioSolutions (ARIN handle FRASS7-ARIN, status validated); registrant org EB-241, 400 Professional Blvd, Gaithersburg, MD 20879 [Confirmed] — stat.ripe.net/AS892#tabId=abuse-contact-finder

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-08 search of Spamhaus DROP and NANOG archives; one unresolved Hurricane Electric automated bogon/IRR-invalid flag conflicting with RIPEstat's RIS data

Network & routing

Network type

enterprise/end-user network for a biopharmaceutical company; not a transit provider or IXP participant [Likely] — bgp.he.net/AS892

Size

1 IPv4 prefix (38.68.74.0/24, 256 addresses); 0 IPv6 prefixes; CAIDA AS rank 50119; customer cone 1 ASN, 2 prefixes, 512 addresses [Confirmed] — stat.ripe.net/AS892#tabId=routing, api.asrank.caida.org/v2/restful/asns/892

Routing/peering

two CAIDA-inferred upstream providers (asnDegree provider=2, peer=0, customer=0) against one RIPEstat-observed neighbour — a methodology discrepancy; AS174 (Cogent Communications) is the consistently observed upstream; prefix seen by 327/327 RIPE RIS IPv4 peers; peering policy not published [Confirmed for CAIDA/RIPEstat data; Likely for peering policy] — bgp.he.net/AS892, stat.ripe.net/AS892#tabId=routing, api.asrank.caida.org/v2/restful/asns/892, emergentbiosolutions.com/contact-us

RPKI

no ROA published for 38.68.74.0/24; validation status "unknown" (not invalid) [Confirmed] — stat.ripe.net/data/rpki-validation/data.json?resource=892&prefix=38.68.74.0/24

Notable usage

internal corporate network for Emergent BioSolutions (vaccines, antibody therapeutics, biodefense countermeasures); no evidence of public-facing hosting or transit use [Likely] — emergentbiosolutions.com/about-us, bgp.he.net/AS892

Related ASNs

none identified in sources checked [Unknown] — n/a

Analyst note

single-homed enterprise ASN, not transit or hosting; low ASN number but only one RDAP registration event exists (2022-06-07), so original-issuance vs. re-registration cannot be resolved from available records.