Autonomous system detail

AS1556

Not announced

No prefixes for this AS number were observed in the RouteViews RIB.

Summary

// analyst note
Combined Route Views observation from route-views2 and route-views6 at 2026-11-06T20:00:00Z; AS_PATH adjacency is not a verified peering or business relationship.
IPv4 prefixes
0
~0 addresses
IPv6 prefixes
0
—
Peer networks
0
0 up · 0 down
IANA block
1-1876
Assigned by ARIN
[ 01 ] — Context

About this ASN.

Updated  ·  Confidence: Low  ·  3 sources  ·  How this page is checked

AS1556 is an ASN with an unknown operator in the supplied evidence. A combined Route Views observation at 2026-11-06 20:00 UTC found five IPv4 prefixes, an estimated 132,096 IPv4 addresses, and no IPv6 prefixes. This is a snapshot from route-views2 and route-views6, not a statement about current routing beyond that observation or the ASN’s deployment status.

The sample contains one observed AS_PATH neighbour, AS1554. That adjacency does not establish a verified peering session, upstream, customer relationship, or operator identity. The supplied IANA records place AS1556 in the 1–1876 resource block, described as assigned by ARIN; this identifies the allocating RIR, not an individual assignment record.

For investigation, compare the five observed IPv4 prefixes against the specific service or network being examined, then check their origin and path in additional dated routing snapshots. Treat the single neighbour as a path clue only. Seek an authoritative assignment record or first-party statement explicitly linking an organization to AS1556 before attributing the network; this evidence supplies no operator, website, country, or security findings.

Routing snapshot
Five IPv4 prefixes and zero IPv6 prefixes were observed in the combined route-views2 and route-views6 snapshot at 2026-11-06 20:00 UTC.
Path clue
AS1554 is the sole sampled AS_PATH neighbour; this does not establish a verified peer or commercial relationship.
Triage
Operator and security status are unknown from the supplied evidence. Investigate specific prefixes and seek an authoritative ASN-to-organization link before attribution.
Observation scope
combined RouteViews snapshot at 2026-11-06T20:00:00.000Z; route-views2, route-views6 [Confirmed] — https://archive.routeviews.org/route-views2/bgpdata/2026.11/RIBS/rib.20261106.2000.bz2
ASN
1556 [Confirmed] — https://www.iana.org/assignments/as-numbers/as-numbers-1.csv
Allocating RIR
ARIN [Confirmed] — https://www.iana.org/assignments/as-numbers/as-numbers-1.csv
IPv4 prefixes observed
5 [Confirmed] — https://archive.routeviews.org/route-views2/bgpdata/2026.11/RIBS/rib.20261106.2000.bz2
IPv4 address estimate
132096 [Confirmed] — https://archive.routeviews.org/route-views2/bgpdata/2026.11/RIBS/rib.20261106.2000.bz2
IPv6 prefixes observed
0 [Confirmed] — https://archive.routeviews.org/route-views6/bgpdata/2026.11/RIBS/rib.20261106.2000.bz2
Observed AS_PATH neighbour count
1 [Confirmed] — https://archive.routeviews.org/route-views2/bgpdata/2026.11/RIBS/rib.20261106.2000.bz2
Sampled AS_PATH neighbour
AS1554 [Confirmed] — https://archive.routeviews.org/route-views6/bgpdata/2026.11/RIBS/rib.20261106.2000.bz2
[ 02 ] — Announced prefixes

What this network routes.

0 prefixes total · as observed by RouteViews at 2026-11-06 · one collector view, not a global census
// IPv4 prefixes0
No IPv4 prefixes announced.
// IPv6 prefixes0
No IPv6 prefixes announced.
[ 03 ] — Notable peers & upstreams

Who it talks to.

0 observed neighbours
Neighbour data unavailable from public BGP collectors.