asn.dev

Autonomous system

AS17841 NCIA-AS-KR NATIONAL INFORMATION RESOURCES SERVICE

Unclassified RIPE

IPv4 addresses 225K 187 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly KR
Exchanges 0 recorded by PCH
Upstreams 4 3 downstream
Flagged prefixes 0 none

Summary

National Information Resources Service

Korea, Republic of · AI-generated

government korea nirs

NCIA-AS-KR is operated by National Information Resources Service.

What it's used for

  • The address space carries government and public sector infrastructure, evidenced by netnames NIRS-KR and KORNET-KR registered to IRT-KRNIC-KR.
  • The AS announces 224,768 IPv4 addresses across 186 prefixes with only 7 observed neighbours, indicating a large-scale access or internal corporate estate rather than a transit provider.

Notable

  • Registrants consistently align with the announcer, with IRT-KRNIC-KR listed for all sampled prefixes.
  • The inventory is heavily subdivided into /19, /20, and /21 blocks, particularly within the 152.99.0.0/19 and 27.101.0.0/17 ranges, suggesting site-by-site segmentation for a large organization.

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

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

4 upstream, 3 downstream and 8 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS4766Korea Telecom19,660
AS9318SK Broadband Co Ltd5,241
AS3786LG DACOM Corporation3,351
AS14841AIRWAVE BROADBAND WIRELESS. INC.2

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, 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 187 prefixes · 225K addresses IPv6 0 prefixes

CountryNamePrefixes
KRKorea, Republic of187

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS17841
Registry name
NCIA-AS-KR-KR
Abuse contact
hostmaster@nic.or.kr
Registered
2001-07-24
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 722 with no ROA
ROAs
0 authorising AS17841
ASPA
no ASPA record
IRR
98% registered · 708 of 722 announcements 7 other origin
Route objects
692 naming AS17841

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: 431 networks and 1,768 prefixes, as published 2026-10-12. 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