183.104.0.0/13

Currently announced by AS4766 KT Corporation (Korea Telecom), in the routed prefix 183.104.0.0/13.

Current ASN: AS4766; KT Corporation (Korea Telecom)
Routed prefix: 183.104.0.0/13; Most specific route covering this prefix
ASNs over time: 1; 1 announcement record
RIR allocation: APNIC; South Korea · 183.96.0.0/11

Routing data · Nov 8, 2026, 10:26 UTC

ASN historyEvery routed prefix covering 183.104.0.0/13

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
183.104.0.0/13	AS4766	KT Corporation (Korea Telecom)	South Korea	Before monitoring	2026-11-08 10:26	Announcing

More specific routes48 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
183.106.28.0/24	AS4766	KT Corporation (Korea Telecom)	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.106.29.0/24	AS4766	KT Corporation (Korea Telecom)	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.106.30.0/24	AS4766	KT Corporation (Korea Telecom)	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.108.96.0/24	AS55615	DOUZONEBIZON	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.109.29.0/24	AS38111	HANA TI	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.109.71.0/24	AS38100	INICIS Co., Ltd	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.109.74.0/24	AS45987	Dongwha Enterprise Co.	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.33.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.35.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.36.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.38.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.40.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.41.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.58.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.60.0/24	AS55593	netmarble	South Korea	2026-11-04 10:21	2026-11-08 10:26	Announcing
183.110.80.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.82.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.83.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.85.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.87.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.88.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.89.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.90.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.91.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.92.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.93.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.94.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.95.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.96.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.97.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.98.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.99.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.100.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.101.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.102.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.128.0/20	AS4766	KT Corporation (Korea Telecom)	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.144.0/21	AS4766	KT Corporation (Korea Telecom)	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.160.0/20	AS4766	KT Corporation (Korea Telecom)	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.176.0/21	AS4766	KT Corporation (Korea Telecom)	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.203.0/24	AS3819	ARIN-EDGEPRIZM-ASN	United States	Before monitoring	2026-11-08 10:26	Announcing
183.110.204.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.110.205.0/24	AS55593	netmarble	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.111.90.0/24	AS131838	eBEST INVESTMENTSECURITIES	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.111.124.0/24	AS38688	GSNeotek	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.111.129.0/24	AS38688	GSNeotek	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.111.142.0/24	AS131802	NongHyup Life Insurance	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.111.228.0/24	AS38688	GSNeotek	South Korea	Before monitoring	2026-11-08 10:26	Announcing
183.111.238.0/24	AS38688	GSNeotek	South Korea	Before monitoring	2026-11-08 10:26	Announcing

Change logAll changes

The routes covering this address have had no origin changes since ASNBase started monitoring.

Look up another address

RIR allocation record

Registry: APNIC
Allocated block: 183.96.0.0/11
Country: South Korea
Allocation date: 2009-11-04
Status: allocated

From the RIRs’ delegated statistics files. Shows where the addresses are registered, not where they are used.

How monitoring works

Every 2 hours ASNBase takes the bgp.tools global routing table (prefix → origin ASN) and compares it with the previous one. The detected time is the time of that comparison; the actual change can be up to about 2 hours earlier.
Only routes seen by more than 100 bgp.tools peers are listed as changes; routes with less visibility are only kept in the history.
A new announcement counts only if it is still in the next routing table, and a withdrawal only if the prefix is missing from two tables in a row, so short flaps are ignored.
ASNBase has been monitoring since 2026-10-19. “Before monitoring” under “First seen” means the route was already announced when monitoring started; the earlier date is unknown.
Prefixes first seen during the first day of monitoring do not count as new announcements: most of them were simply missing from the table at the moment monitoring started.
Countries and regions follow the ASN’s registration, not the actual location of the IP addresses.