asn.dev

Autonomous system

AS18033 CMBTGD-AS-KR CMB TAEGU BROADCASTING

Unclassified APNIC

IPv4 addresses 11.01K 14 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly KR
Exchanges 0 recorded by PCH
Upstreams 2 1 downstream
Flagged prefixes 0 none

Summary

CMB Taegu Broadcasting

Korea, Republic of · AI-generated

broadcasting business korea

CMBTGD-AS-KR is operated by CMB Taegu Broadcasting.

What it's used for

  • The address space carries netnames CMBDONGBU-KR and CMBSUSUNG-KR, indicating internal segmentation for the Dongsu and Suseong regions of the broadcaster.
  • The AS announces 11,008 IPv4 addresses across 14 prefixes with only 2 observed neighbours, a ratio consistent with a small, self-contained corporate or media network rather than a transit provider.

Notable

  • All registrants are listed as IRT-KRNIC-KR, which aligns with the announcer's identity as a Korean entity.
  • The inventory consists of a mix of /21, /22, /23, and /24 blocks, with the largest allocations being 125.62.216.0/21 and 203.166.208.0/21.

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

2 upstream, 1 downstream and 3 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS9318SK Broadband Co Ltd2,098
AS18168CMB TAEGU BROADCAST SUSEONG10

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 14 prefixes · 11.01K addresses IPv6 0 prefixes

CountryNamePrefixes
KRKorea, Republic of14

Registry

Allocation record

APNIC · via Atlas (registry + RDAP)
Registry
APNIC
Handle
AS18033
Registry name
CMBTGD-AS-KR-KR
Abuse contact
hostmaster@nic.or.kr
Registered
2002-12-09
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 34 with no ROA
ROAs
0 authorising AS18033
ASPA
no ASPA record
IRR
97% registered · 33 of 34 announcements 1 other origin
Route objects
38 naming AS18033

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 1,773 prefixes, as published 2026-10-13. 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