AS1521

AS1521 is an ASN listed in IANA’s AS-number registry block 1–1876 as assigned by ARIN. In the combined RouteViews observation at 2026-11-03 14:00 UTC, using route-views2 and route-views6, it had zero observed IPv4 prefixes, zero observed IPv6 prefixes, zero estimated IPv4 addresses, and zero observed peers. This snapshot does not identify an operator or establish whether the ASN is deployed, active, or inactive.

For identification, treat AS1521 as unobserved in this particular routing snapshot, not as proof of dormancy or non-use at other times. The empty AS_PATH-neighbour sample supplies no observed neighbours to investigate from these collectors. If assessing a specific network event, compare its timestamp and announced prefix with contemporaneous routing data, then seek an independently documented link between the ASN and the network or organization in question.

The registry block records the allocating RIR only; it does not establish an individual assignment, country, owner, or operational purpose.

Registry

IANA lists AS1521 in the block assigned by ARIN.

Routing snapshot

At 2026-11-03 14:00 UTC, the combined route-views2 and route-views6 observation contained zero IPv4 prefixes, zero IPv6 prefixes, zero estimated IPv4 addresses, and zero peers.

Triage

No AS_PATH neighbours were observed in this sample; that absence does not establish inactivity or safety.

RIR

ARIN [Confirmed] — https://www.iana.org/assignments/as-numbers/as-numbers-1.csv

Observation scope

combined RouteViews snapshot at 2026-11-03T14:00:00.000Z; route-views2, route-views6 [Confirmed] — https://archive.routeviews.org/route-views2/bgpdata/2026.11/RIBS/rib.20261103.1400.bz2

ASN

1521 [Confirmed] — https://www.iana.org/assignments/as-numbers/as-numbers-1.csv

Assignment class

Unknown [Unknown] — https://www.iana.org/assignments/as-numbers/as-numbers-1.csv

IPv4 prefix count

0 [Confirmed] — https://archive.routeviews.org/route-views2/bgpdata/2026.11/RIBS/rib.20261103.1400.bz2

IPv4 address estimate

0 [Confirmed] — https://archive.routeviews.org/route-views2/bgpdata/2026.11/RIBS/rib.20261103.1400.bz2

IPv6 prefix count

0 [Confirmed] — https://archive.routeviews.org/route-views6/bgpdata/2026.11/RIBS/rib.20261103.1400.bz2

Peer count

0 [Confirmed] — https://archive.routeviews.org/route-views2/bgpdata/2026.11/RIBS/rib.20261103.1400.bz2

Sampled AS_PATH neighbours

None observed [Confirmed] — https://archive.routeviews.org/route-views6/bgpdata/2026.11/RIBS/rib.20261103.1400.bz2