27.47.0.0/18

Currently announced by AS17622 China Unicom Guangzhou network, in the routed prefix 27.47.0.0/18.

Current ASN: AS17622; China Unicom Guangzhou network
Routed prefix: 27.47.0.0/18; Most specific route covering this prefix
ASNs over time: 2; 2 announcement records
RIR allocation: APNIC; China · 27.40.0.0/13

Routing data · Oct 23, 2026, 06:22 UTC

ASN historyEvery routed prefix covering 27.47.0.0/18

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
27.47.0.0/18	AS17622	China Unicom Guangzhou network	China	Before monitoring	2026-10-23 06:22	Announcing
27.40.0.0/13	AS17816	CHINA169-GZ	China	Before monitoring	2026-10-23 06:22	Announcing

More specific routes21 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
27.47.0.0/19	AS17622	China Unicom Guangzhou network	China	Before monitoring	2026-10-23 06:22	Announcing
27.47.0.0/23	AS17622	China Unicom Guangzhou network	China	Before monitoring	2026-10-23 06:22	Announcing
27.47.2.0/23	AS17622	China Unicom Guangzhou network	China	Before monitoring	2026-10-23 06:22	Announcing
27.47.4.0/23	AS17622	China Unicom Guangzhou network	China	Before monitoring	2026-10-23 06:22	Announcing
27.47.6.0/23	AS17622	China Unicom Guangzhou network	China	Before monitoring	2026-10-23 06:22	Announcing
27.47.8.0/22	AS17622	China Unicom Guangzhou network	China	Before monitoring	2026-10-23 06:22	Announcing
27.47.8.0/24	AS17622	China Unicom Guangzhou network	China	2026-10-22 22:19	2026-10-23 06:22	Announcing
27.47.9.0/24	AS17622	China Unicom Guangzhou network	China	2026-10-22 22:19	2026-10-23 06:22	Announcing
27.47.10.0/23	AS17622	China Unicom Guangzhou network	China	Before monitoring	2026-10-23 06:22	Announcing
27.47.16.0/22	AS17622	China Unicom Guangzhou network	China	Before monitoring	2026-10-23 06:22	Announcing
27.47.32.0/19	AS17622	China Unicom Guangzhou network	China	Before monitoring	2026-10-23 06:22	Announcing
27.47.32.0/23	AS17622	China Unicom Guangzhou network	China	Before monitoring	2026-10-23 06:22	Announcing
27.47.34.0/23	AS17622	China Unicom Guangzhou network	China	Before monitoring	2026-10-23 06:22	Announcing
27.47.36.0/23	AS17622	China Unicom Guangzhou network	China	Before monitoring	2026-10-23 06:22	Announcing
27.47.38.0/23	AS17622	China Unicom Guangzhou network	China	Before monitoring	2026-10-23 06:22	Announcing
27.47.40.0/23	AS17622	China Unicom Guangzhou network	China	Before monitoring	2026-10-23 06:22	Announcing
27.47.42.0/23	AS17622	China Unicom Guangzhou network	China	Before monitoring	2026-10-23 06:22	Announcing
27.47.56.0/22	AS17622	China Unicom Guangzhou network	China	Before monitoring	2026-10-23 06:22	Announcing
27.47.56.0/23	AS17622	China Unicom Guangzhou network	China	Before monitoring	2026-10-23 06:22	Announcing
27.47.58.0/23	AS17622	China Unicom Guangzhou network	China	Before monitoring	2026-10-23 06:22	Announcing
27.47.8.0/23	AS17622	China Unicom Guangzhou network	China	Before monitoring	2026-10-22 20:21	Stopped

Change logAll changes

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

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RIR allocation record

Registry: APNIC
Allocated block: 27.40.0.0/13
Country: China
Allocation date: 2010-03-23
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.