Hangzhou · China
PeeringDB records three exchanges in Hangzhou and no colocation facilities. ZXIX Hangzhou is the best connected with 28 participants, ahead of NNIX with 10 and IXPSU Hangzhou with 5, for 43 participant records in total. An address that geolocates to Hangzhou names the operator that registered the block rather than a device location.
Internet exchanges in Hangzhou
An exchange is a shared switch where networks hand traffic to each other directly. Participant counts come from PeeringDB, where each network maintains its own record.
| Exchange | Participants | Registry carriers peering |
|---|---|---|
ZXIX Hangzhou ZX Internet Exchange Hangzhou | 28 | none in the registry |
NNIX | 10 | none in the registry |
IXPSU Hangzhou Internet Exchange Point SU Hangzhou by HUIZE LTD | 5 | none in the registry |
Exchange records: PeeringDB.
What a Hangzhou IP address tells you
All of the peering PeeringDB records in Hangzhou sits in exchanges. ZXIX Hangzhou, the ZX Internet Exchange, carries 28 of the city's 43 participant records, NNIX carries 10, and IXPSU Hangzhou, run by HUIZE LTD, carries 5. The registry holds no facility entry for Hangzhou, so it documents no network presence in any named building here. No mobile ASN from China Mobile, China Telecom or China Unicom appears on the three fabrics.
An address that geolocates to Hangzhou reflects a registry entry, not a measurement. Operators announce address blocks from records they filed themselves, and one record can cover a province or a whole country while geolocation databases pin it to a single city. Mobile traffic narrows the picture further, since handsets reach the internet through a small set of gateways, and every subscriber routed through a Hangzhou gateway looks like a Hangzhou user whatever province the phone is in.
The origin ASN on the prefix is the more reliable thing to read. It names the network that announces the address, and the netname on the same prefix shows how that network labels the range, often by service type rather than by city. Checking whether that ASN turns up in the participant lists at ZXIX Hangzhou or NNIX tells you whether the operator has any documented presence in the city's exchange routing.
Mobile carriers in China
A mobile address in Hangzhou is routed by one of the country's operators. Each entry lists the operator's ASNs, so you can check which network an address belongs to.
Questions
Which internet exchanges are in Hangzhou?
Three appear in PeeringDB. ZXIX Hangzhou has 28 participants, NNIX has 10, and IXPSU Hangzhou, operated by HUIZE LTD, has 5. That comes to 43 participant records, and ZXIX Hangzhou accounts for about two thirds of them.
Are there data centres in Hangzhou in PeeringDB?
The registry lists no facility in Hangzhou, so it documents no network presence in a named building there. That is a gap in what operators have published rather than a statement about the city, and the peering it does record all sits at the three exchanges.
Does an IP that geolocates to Hangzhou mean the device is there?
No. The city label comes from the operator's registry record for the block. A mobile connection can leave through a Hangzhou gateway while the handset is in another province, and databases repeat the published location. Read the origin ASN and the prefix netname instead.
Sources
- PeeringDB - exchanges, participant counts, facilities and network presence, snapshot 2026-09-07
- PROXIES.SX carrier and ASN registry - operator ASNs used to match peering participants