AS212237 — PXNET Changgong Zhang

AS212237 announces 1 IPv4 prefixes covering 1,024 addresses and 6 IPv6 prefixes.

About this network

AS212237 is operated by Phoenix Network (PXNET), a Chinese educational and research network.

What it's used for

• The address space is registered under the netname JPXXJSFW with registrant IRT-PXIPNET-CN, indicating a specific institutional allocation within China.
• The AS announces 1024 IPv4 addresses across a single /22 prefix and 6 IPv6 prefixes, while maintaining 11 observed routing neighbours. This ratio of modest address inventory to a moderate number of peers suggests a network focused on connectivity and peering rather than large-scale residential access or pure transit.
• As an educational and research network, the traffic primarily consists of academic research data, institutional web services, and staff/student connectivity for the associated university or research body.

Notable

• The RDAP registrant IRT-PXIPNET-CN aligns with the AS handle Phoenix Network and the registry holder PXNET Changgong Zhang, confirming consistent ownership.
• The inventory consists of one contiguous IPv4 block and a small set of IPv6 prefixes, typical for a single-site or small multi-site academic institution.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 103.31.236.0/22
• 2403:6380:10::/44
• 2403:6380:30::/46
• 2403:6380:40::/48
• 2403:6380:42::/47
• 2602:f2dc:aa::/48
• 2602:feda:d20::/45

Upstream networks

• AS53667 FranTech Solutions
• AS34927 iFog GmbH
• AS41051 Openfactory GmbH
• AS212895 Johannes Ernst
• AS20473 The Constant Company, LLC
• AS917 Misaka Network, Inc.
• AS47272 HYEHOST LLC
• AS199829 Akronic Network LTDA
• AS57695 Misaka Network, Inc.
• AS58057 Securebit AG
• AS37989 DCS1 Pte. Ltd.

Adjacent networks

• AS53667 FranTech Solutions
• AS34927 iFog GmbH
• AS41051 Openfactory GmbH
• AS212895 Johannes Ernst
• AS20473 The Constant Company, LLC
• AS917 Misaka Network, Inc.
• AS47272 HYEHOST LLC
• AS199829 Akronic Network LTDA
• AS57695 Misaka Network, Inc.
• AS37989 DCS1 Pte. Ltd.
• AS58057 Securebit AG

Routing security

• RPKI: 18 valid, 0 invalid and 2 not-found announcements; 17 ROAs.
• ASPA: 9 authorised providers.
• IRR: 70% of announcements registered; 27 route objects.
• Listed in as-sets: AS-4IXP, AS-4IXP-RS, AS-4IXPV6, AS-CR, AS-CTBC-TOOLS-11, AS-DURAND1-CUSTOMER, AS-EVIX, AS-HURRICANE, AS-HURRICANEV6, AS-HYEHOST:AS-ASHBURN, AS-HYEHOST:AS-WOLVERHAMPTON, AS-IFOG-US, AS-MISAKA-CUSTOMERS2, AS-MOEDOVE, AS-MOEDOVE, AS-MOEDOVE, AS-MOEDOVE, AS-NATOLAB-C, AS-NATOLAB-C, AS-PXNET, AS-PYRAMIX, AS-RETN-ACTUAL-V4, AS-RETN-ACTUAL-V6, AS-TRANSROUTE-SPEC, AS199310:AS-DOWNSTREAM.

Internet exchanges

• 4b42 Internet Exchange Point — Zurich, Switzerland