AS604

AS604 is a legacy 16-bit ASN whose WHOIS trail points to One Lambda, Incorporated, a transplant-immunogenetics diagnostics company (HLA typing) that Thermo Fisher Scientific acquired in mid-2012. This was never a transit, access, or content network — no PeeringDB object exists for it, and nothing in the routing data suggests it served as anything beyond a small end-user enterprise ASN, if it was ever announced at all. The defining fact about AS604 today is that it has effectively vanished from the live registry: ARIN's own RDAP and Whois-RWS both return "not found" for it, and RIPEstat's whois passthrough — while confirming ARIN as the resource's delegated RIR — likewise turns up zero records. Every routing source checked (RIPEstat routing-status, RIPEstat announced-prefixes, bgp.he.net) agrees the ASN currently announces zero IPv4 and zero IPv6 prefixes, has zero observed BGP neighbours, and is invisible to all 325/321 RIS route collectors queried. CAIDA has no AS-rank entry for it at all. No abuse signal, hijack history, or NANOG discussion was found anywhere. A third-party aggregator (IPinfo.io) carries a stale mirrored value of an ARIN allocation date, but that value could not be reproduced against any live first-party ARIN source this cycle, since the underlying ARIN record itself is gone.

Operator

One Lambda, Incorporated (org handle ONELAMBDA-INC), a Thermo Fisher Scientific Inc. brand since its 2012 acquisition of One Lambda [Confirmed — two independent angles] — https://ipinfo.io/AS604, https://www.thermofisher.com/us/en/home/brands/onelambda.html

Country / RIR

United States, ARIN (per RIPEstat as-overview block "1-1876, Assigned by ARIN") [Confirmed] — https://stat.ripe.net/data/as-overview/data.json?resource=604

Allocated date

Unknown — ARIN's own live RDAP (rdap.arin.net/registry/autnum/604) returns HTTP 404 and ARIN Whois-RWS returns "no record found," so no autnum object with a top-level events[] array exists to read a registration date from; the record has been withdrawn/deregistered from ARIN's current registry. A third-party aggregator (IPinfo.io) shows a mirrored value of 2009-07-21, but this could not be confirmed against any live first-party RIR source this cycle — recorded here only as an unverified third-party claim, not written into the JSON

[Unknown] — https://rdap.arin.net/registry/autnum/604, https://whois.arin.net/rest/asn/AS604, https://ipinfo.io/AS604

Org status

Deregistered / not present in ARIN's current authoritative registry as of 2026-07-16/17 — ARIN RDAP and Whois-RWS both return no record; RIPEstat confirms ARIN as the delegated RIR for resource 604 but also returns zero WHOIS records

[Confirmed] — https://rdap.arin.net/registry/autnum/604, https://whois.arin.net/rest/asn/AS604

Website

Formerly onelambda.com (2015 Wayback snapshot); the brand now lives at thermofisher.com/us/en/home/brands/onelambda.html — neither is a network-operator site [Likely — live fetch of both pages failed at the tool layer; existence corroborated via Wayback's "available" API and search indexing] — https://web.archive.org/web/20150217031611/http://www.onelambda.com:80/, https://www.thermofisher.com/us/en/home/brands/onelambda.html

Abuse/security context

No notable public abuse signal found — RIPEstat abuse-contact-finder returns an empty contact list, no Spamhaus ASN-DROP hit (fetch inconclusive), no BGP hijack/leak history, and no NANOG mailing-list discussion located, consistent with an ASN that has no live announced address space

Network & routing

Network type

Not an Internet network operator/ISP — a non-transit, end-user (enterprise) ASN associated with a diagnostics company, not a backbone/access/content/IX network [Likely] — https://ipinfo.io/AS604, https://www.thermofisher.com/us/en/home/brands/onelambda.html

Routing status

Dormant/inactive — 0 announced IPv4 and 0 announced IPv6 prefixes, 0 observed BGP neighbours, seen by 0 of 325 (v4) and 0 of 321 (v6) RIPE RIS peers; corroborated by bgp.he.net showing 0 announced/originated prefixes and 0 peers

[Confirmed — two independent angles] — https://stat.ripe.net/data/routing-status/data.json?resource=604, https://bgp.he.net/AS604

CAIDA AS rank / customer cone

Unranked — CAIDA ASRank has no record for AS604 (asn: null), so no rank or customer-cone size can be reported [Confirmed] — CAIDA ASRank API (asn=null response)

Peering

No PeeringDB network object exists for AS604 (both the web page and the API return not-found); no operator-published peering policy located [Confirmed] — https://www.peeringdb.com/api/net?asn=604, https://www.peeringdb.com/asn/604

RPKI

Not evaluable — AS604 has no announced prefixes, so there is nothing to validate against ROAs [Unknown] — RIPEstat rpki-validation (skipped, requires a prefix parameter)

ASN

AS604 [Confirmed] — https://stat.ripe.net/data/as-overview/data.json?resource=604

Analyst note

Encountered as a dormant, effectively deregistered legacy ASN. WHOIS mirrors attribute it to One Lambda (now a Thermo Fisher brand), but ARIN's own live registry no longer carries a record for it — a genuine registry-withdrawal case, distinct from an unverified allocation date.