asn.dev

Autonomous system

AS51896 HRINGDU-AS

Unclassified RIPE

IPv4 addresses 20.74K 7 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly IS
Exchanges 1 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Hringdu

Iceland · AI-generated

residential isp fiber iceland

HRINGDU-AS is operated by Hringdu ehf.

What it's used for

  • The address space carries residential and business access traffic, evidenced by reverse DNS entries such as fiber.hringdu.is, dynamic.hringdu.is, vps.hringdu.is, and xdsl.hringdu.is.
  • The AS announces 20,736 IPv4 addresses across 7 prefixes and 1 IPv6 prefix, while maintaining only 3 observed routing neighbours. This high address-to-neighbour ratio indicates an access network rather than a transit provider.
  • Traffic from this AS consists of subscriber eyeballs and small business endpoints, reflecting Hringdu's role as an Icelandic telecommunications provider offering fiber, DSL, and VPS services.

Notable

  • Registrants for the majority of prefixes are Hringdu ehf or Hringdu NOC, consistent with the AS holder. One prefix (31.209.144.0/20) is registered to Mila hf, a separate Icelandic network operator, suggesting a specific block allocation or historical relationship.
  • The inventory is composed of multiple distinct IPv4 blocks, including a /19, two /20s, a /21, two /22s, and a /24, alongside a single /29 IPv6 prefix.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.

Interconnection

Peering at a glance

Full topology · Graph

Internet exchanges

Recorded at 1 exchange in 1 country, largest first.

ExchangeLocationTheir address
Reykjavik Internet ExchangeReykjavik, Iceland195.130.211.26

Transit providers

1 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS6677Mila hf560

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 7 prefixes · 20.74K addresses IPv6 1 prefixes

CountryNamePrefixes
ISIceland8

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS51896
Registry name
HRINGDU-AS
Registrant
HRINGDU
Abuse contact
hringdu@hringdu.is
Registered
2010-11-25
Last changed
2022-11-30
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 10 valid, 0 with no ROA
ROAs
10 authorising AS51896
ASPA
no ASPA record
IRR
100% registered · 10 of 10 announcements
Route objects
15 naming AS51896

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

Spamhaus DROP

Not on ASN-DROP The network as a whole is not listed.

No DROP prefixes None of its announced space is on the DROP prefix list.

Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,772 prefixes, as published 2026-10-15. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.

FBI IC3

No IC3 indicators Nothing from the FBI IC3 feed.

IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check