59.16.0.0/12

Currently announced by AS4766 KT Corporation (Korea Telecom), in the routed prefix 59.16.0.0/12.

Current ASN: AS4766; KT Corporation (Korea Telecom)
Routed prefix: 59.16.0.0/12; Most specific route covering this prefix
ASNs over time: 1; 2 announcement records
RIR allocation: APNIC; South Korea · 59.0.0.0/11

Routing data · Nov 10, 2026, 12:46 UTC

ASN historyEvery routed prefix covering 59.16.0.0/12

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
59.16.0.0/12	AS4766	KT Corporation (Korea Telecom)	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.0.0.0/11	AS4766	KT Corporation (Korea Telecom)	South Korea	Before monitoring	2026-11-10 12:46	Announcing

More specific routes29 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
59.16.0.0/13	AS4766	KT Corporation (Korea Telecom)	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.16.50.0/24	AS4766	KT Corporation (Korea Telecom)	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.17.3.0/24	AS10188	Songdo Chadwick international School	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.17.186.0/24	AS17567	Airport Railroad Co ltd	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.17.188.0/24	AS17567	Airport Railroad Co ltd	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.18.64.0/19	AS4766	KT Corporation (Korea Telecom)	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.18.87.0/24	AS4766	KT Corporation (Korea Telecom)	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.18.96.0/19	AS4766	KT Corporation (Korea Telecom)	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.18.215.0/24	AS18032	SHINHAN DS	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.18.252.0/24	AS131836	Firstfire Marine Insurance	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.23.228.0/22	AS152232	kt cloud Co., Ltd	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.24.0.0/13	AS4766	KT Corporation (Korea Telecom)	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.25.64.0/24	AS38104	Hyejeon University	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.25.65.0/24	AS38104	Hyejeon University	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.25.66.0/24	AS38104	Hyejeon University	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.25.67.0/24	AS38104	Hyejeon University	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.25.68.0/24	AS38104	Hyejeon University	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.26.6.0/24	AS9782	WooSong University	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.26.7.0/24	AS18029	Daejeon Helath Sciences College	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.26.221.0/24	AS9775	Hannam University	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.26.222.0/24	AS9775	Hannam University	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.26.223.0/24	AS9775	Hannam University	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.27.104.0/24	AS10058	NACUFOK	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.27.163.0/24	AS23552	Korea Nazarene University	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.27.164.0/22	AS23552	Korea Nazarene University	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.27.168.0/24	AS23552	Korea Nazarene University	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.29.21.0/24	AS55615	DOUZONEBIZON	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.29.54.0/24	AS55615	DOUZONEBIZON	South Korea	Before monitoring	2026-11-10 12:46	Announcing
59.30.254.0/24	AS55615	DOUZONEBIZON	South Korea	Before monitoring	2026-11-10 12:46	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: 59.0.0.0/11
Country: South Korea
Allocation date: 2004-08-02
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.