AS4812China Telecom Shanghai Province Network
ChinaRegistryAPNICTypeEyeballAs of 26th September 2026, AS4812 (China Telecom Shanghai Province Network), an access network registered in China with APNIC, originates 494 IPv4 prefixes covering 13.6M addresses and 99 IPv6 prefixes. By IPv4 address space that makes it the 53rd-largest of the 79,516 networks we see originating IPv4, and the 7th-largest of 607 in China. It is seen behind 2 upstream networks, most often AS4134 (China Telecom Backbone) and AS4809 (China Telecom Next Generation Carrier…), and in front of 46 downstream networks. 87% of its announcements have a valid RPKI ROA; 13 are RPKI-invalid. 78% of its routes reach at least 90% of full-feed peers, and 60 prefixes are also originated by another network.
At a glance
IPv4 prefixes
IPv6 prefixes
IPv4 addresses
IPv6 /64s
Upstream graph
The networks AS4812 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS4812 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.
Neighbouring networks
98
adjacent networks
- Upstreams
- 22%
- Peers
- 5051%
- Downstreams
- 4647%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS4134China Telecom Backbone | CN | Peer | 46,609 | 144 |
| AS4809China Telecom Next Generation Carrier Network | CN | Peer | 10,191 | 143 |
Prefixes
All 593The largest blocks AS4812 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 101.80.0.0/13 | 524k | 80/81 |
| 101.88.0.0/13 | 524k | 80/81 |
| 101.224.0.0/13 | 524k | 80/81 |
| 180.152.0.0/13 | 524k | 80/81 |
| 180.160.0.0/13 | 524k | 80/81 |
| 180.168.0.0/13 | 524k | 80/81 |
| 58.32.0.0/14 | 262k | 81/81 |
| 58.36.0.0/14 | 262k | 81/81 |
| 101.82.0.0/15 | 131k | 81/81 |
| 101.230.0.0/15 | 131k | 81/81 |
Routing health
How AS4812's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.
RPKI origin validation
- Valid87.0%516
- Invalid2.2%13
- No ROA10.8%64
Propagation
- Globally propagated90% of full-feed peers or more78.2%464
- Partially propagated40% to 90%6.1%36
- Seen by few peersUnder 40%15.7%93
Prefix sizes
IPv4 — 494 prefixes
IPv6 — 99 prefixes
- /324.3B × /6442.4%42
- /332.1B × /6410.1%10
- /35537M × /645.1%5
- /36268M × /6420.2%20
- /4016.8M × /642.0%2
- /424.2M × /641.0%1
- /432.1M × /643.0%3
- /441M × /642.0%2
- /4865.5k × /6414.1%14
Recent changes
Announcements that started or stopped since 28th Aug 2026.
No announcement by AS4812 started or stopped in this period.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.