AS903

AS903 is a small, currently-routed autonomous system whose operator is not established by any operator-published source: no company page, peering policy, looking-glass, or NANOG/RIPE post names AS903 under its own domain, so identity stays Unknown. Its live routing footprint, by contrast, is confirmed by direct measurement rather than a registry claim.

As observed by RouteViews at 2026-08-20T00:00:00Z, AS903 originated 15 IPv4 prefixes and 0 IPv6 prefixes, an estimated 3,840 IPv4 addresses, with exactly one observed neighbour, AS13760. This is a single-collector, single-instant snapshot: a prefix invisible here is simply unseen by this vantage point, not necessarily unannounced elsewhere.

CAIDA's AS-relationships dataset carries no row naming AS903 as either origin or counterparty in either direction, so no provider, customer, or peer relationship is inferred from that dataset; this is a floor in the data, not evidence that AS903 has no real-world upstreams.

IANA's AS-numbers registry places AS903 inside the 1-1876 block assigned to ARIN, with no allocation or last-updated date available from any permitted source. A September 2026 search of Spamhaus and abuse.ch, plus general web and NANOG-archive searches, found no public record tying AS903 to abuse, malware, or a security incident, though two of those checks could not be independently confirmed due to access blocks.

Routing status

Actively announced per RouteViews at 2026-08-20 -- 15 IPv4 prefixes, 0 IPv6 prefixes, ~3,840 IPv4 addresses, one observed neighbour (AS13760).

Relationship visibility

CAIDA AS-relationships carries no row for AS903 in either direction, so no upstream, customer, or peer is inferred from that dataset.

Identity gap

No operator-published source names AS903, so operator, as_name, and country stay Unknown; treat any third-party IP-intelligence label as unconfirmed.

RPKI / IX presence

Unknown -- no permitted source covers either.

Operator

Unknown -- no operator-published source names AS903 [Unknown] (WebSearch, angle A2)

RIR

ARIN [Confirmed] (the IANA Autonomous System Number registry, block 1-1876, Assigned by ARIN)

Allocated / Last updated

Unknown [Unknown]

Security context

No public abuse or threat-intelligence listing found as of a September 2026 search [Unknown] (Spamhaus and abuse.ch ThreatFox checks were inconclusive due to access blocks)

Network & routing

Upstreams

none inferred [Confirmed] (the cached registry snapshots/caida-as-rel.csv -- no row names AS903 in either column)

AS rank / customer cone

Unknown -- unresolved for publication [Unknown]

ASN

903 [Confirmed] (the IANA Autonomous System Number registry, block 1-1876)

IPv4 prefixes

15 [Confirmed] (the RouteViews BGP routing data (CC BY 4.0) AS903)

IPv6 prefixes

0 [Confirmed] (the RouteViews BGP routing data (CC BY 4.0) AS903)

IPv4 address estimate

3,840 [Confirmed] (the RouteViews BGP routing data (CC BY 4.0) AS903)

Peer count

1, observed neighbour AS13760 [Confirmed] (the RouteViews BGP routing data (CC BY 4.0) AS903)