121.236.128.0/17

Currently announced by AS140292 CHINATELECOM Jiangsu province Suzhou 5G network, in the routed prefix 121.236.128.0/17.

Current ASN: AS140292; CHINATELECOM Jiangsu province Suzhou 5G network
Routed prefix: 121.236.128.0/17; Most specific route covering this prefix
ASNs over time: 3; 3 announcement records
RIR allocation: APNIC; China · 121.224.0.0/12

Routing data · Nov 8, 2026, 10:26 UTC

ASN historyEvery routed prefix covering 121.236.128.0/17

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
121.236.128.0/17	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.224.0.0/12	AS4134	China Telecom	China	Before monitoring	2026-11-08 10:26	Announcing
121.224.0.0/12	AS208972	GIBIRNET	Türkiye	2026-10-21 18:20	2026-10-21 20:22	Stopped

More specific routes92 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
121.236.128.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.129.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.130.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.131.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.132.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.133.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.134.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.135.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.136.0/23	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.138.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.139.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.140.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.141.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.142.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.143.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.144.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.145.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.146.0/23	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.148.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.149.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.150.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.151.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.152.0/22	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.156.0/22	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.160.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.161.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.163.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.164.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.165.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.167.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.168.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.169.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.170.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.171.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.172.0/23	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.174.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.176.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.177.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.178.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.179.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.180.0/23	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.182.0/23	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.184.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.185.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.186.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.187.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.188.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.189.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.190.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.191.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.192.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.193.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.195.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.196.0/23	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.198.0/23	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.200.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.201.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.202.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.203.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.205.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.206.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.207.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.208.0/22	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.216.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.217.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.220.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.221.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.222.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.223.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.224.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.225.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.226.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.227.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.228.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.229.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.230.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.231.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.232.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.233.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.234.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.235.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.236.0/22	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.240.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.241.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.242.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.243.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.244.0/22	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.248.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.249.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.251.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.252.0/22	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-08 10:26	Announcing
121.236.250.0/24	AS140292	CHINATELECOM Jiangsu province Suzhou 5G network	China	Before monitoring	2026-11-03 12:24	Stopped

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: 121.224.0.0/12
Country: China
Allocation date: 2006-06-30
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.