AS921

AS921 is a registered autonomous system administered by ARIN that currently originates zero prefixes in the routing table, making it a dormant or not-yet-routed registration rather than an active carrier or enterprise network.

As observed by RouteViews at its 2026-08-20 dump, neither the route-views2 nor route-views6 collector recorded any IPv4 or IPv6 prefix originated by AS921, and no neighboring ASN was observed adjacent to it. This is a real, sourced zero, not a failed lookup, and it is scoped to that single collector instant.

No permitted source identifies AS921's operator. Forward searches for peering-policy pages, looking-glass entries, and NANOG or RIPE list posts naming AS921 under an operator's own name returned nothing; the only hits were unrelated (a flight number, a course code, a bill number) or third-party directories, which do not establish operator identity under this entry's binding test. Operator, as_name, country, network type, and website therefore stay Unknown.

The CAIDA AS Relationships cache (dataset date 2026-08-01) carries no row naming AS921 as either a column-1 target or a column-2 counterparty, so its relationships are unclassified rather than a zero floor of providers, customers, or peers — CAIDA simply has no published-neighbour data for this ASN.

The IANA AS Number registry places AS921 within the 1-1876 range recorded as "Assigned by ARIN," so ARIN is the administering RIR. IANA's per-block table gives no registration date or reference for this range, and allocation date, RPKI validation posture, IX presence, and abuse contacts all remain Unknown.

Blocklist status

AS921 is not present in the Spamhaus ASN-DROP list as of 2026-08-23 (checked both asndrop.txt and asndrop.json, which span ASN values 245 to 219,502 with none in the 900-950 range) — spamhaus.org.

Community/abuse mentions

No NANOG mailing-list post and no general abuse or threat-intel coverage naming AS921 was found via web search as of 2026-08-23 — seclists.org/nanog.

CVE / malware

No CVE, malware, or botnet command-and-control association naming AS921 found as of an August 2026 search.

Routing hygiene

No hijack or route-leak incident found for AS921; the ASN currently announces no prefixes at all, so there is nothing in the current table to leak or hijack.

Operator

Unknown — no operator-published material (own domain, IR/investor page, peering policy, looking glass, or a NANOG/RIPE list post under an operator's own name) names AS921's holder; third-party directories do not qualify under the binding test [Unknown]

Country / RIR

Country Unknown — no operator-published material establishes a jurisdiction. RIR: ARIN — the IANA AS Number registry records the 1-1876 range containing AS921 as "Assigned by ARIN" [Confirmed for RIR; Unknown for country] — the IANA Autonomous System Number registry 1-1876

Allocated

Unknown [Unknown]

Org status

Unknown — no operator-published material identifies a registrant organization or corporate status [Unknown]

Contacts

Unknown [Unknown]

Security/abuse context (NEUTRAL, DATED)

see the Security section above; not present in Spamhaus ASN-DROP as of 2026-08-23, and no NANOG or general abuse/threat-intel coverage found as of an August 2026 search

Network & routing

Network type

Unknown — no operator-published material identifies this network's purpose [Unknown]

Size

0 IPv4 prefixes and 0 IPv6 prefixes originated; no address estimate, as observed by RouteViews on 2026-08-20 across both the route-views2 and route-views6 collectors [Confirmed] — the RouteViews BGP routing data (CC BY 4.0) AS921 (anchored grep ^921, — no row returned)

Routing/peering

0 neighboring ASNs observed by RouteViews on 2026-08-20. No relationship data in the CAIDA AS Relationships cache (dataset date 2026-08-01) — AS921 appears in neither column 1 nor column 2, so relationships are unclassified, not a zero floor of providers, customers, or peers. Peering policy: Unknown [Confirmed for the RouteViews null result; unclassified, not Confirmed-zero, for relationships] — the RouteViews BGP routing data (CC BY 4.0) AS921, the cached registry snapshots/caida-as-rel.csv AS921

RPKI

Unknown — an unevaluated status, not a report of an absent or invalid ROA [Unknown]

Notable usage

Unknown — no operator-published material found [Unknown]

Related ASNs

Unknown — none identified [Unknown]

Related fields

AS rank, customer cone size, and MANRS membership are all Unknown [Unknown]

Analyst note

Registered ARIN ASN (IANA 1-1876 block) with no observed routing activity — 0 IPv4/IPv6 prefixes and 0 neighboring ASNs in the RouteViews 2026-08-20 snapshot — and no CAIDA-classified relationships as of the 2026-08-01 dataset (unclassified, not a zero floor). No permitted source names an operator. Not present on Spamhaus ASN-DROP as of 2026-08-23, and no NANOG or general abuse coverage found. Allocation date, RPKI status, IX presence, and abuse contacts are Unknown.