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Who holds an IP address, prefix or AS number, how it is routed (origin AS, RPKI, IRR), its reverse DNS, blocklist listings and PeeringDB record, with what to fix first.

IP address, prefix or AS number

AS4809 · 

curl -s "https://thenetworkery.com/api/v1/network-report?query=AS4809"
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Warning: AS4809 (CHINATELECOM-CORE-WAN-CN2) announces 233 IPv4 and 196 IPv6 prefixes. 2 warnings

AS pageAS4809
HolderCHINATELECOM-CORE-WAN-CN2 - China Telecom Next Generation Carrier Network
AllocationAPNIC, China (CN), allocated 1996-01-09
Prefixes (IPv4 / IPv6)233 / 196
RPKI valid98% (421 / 429)
Upstreams and peers20
Peering policySelective

What to fix

  1. Warning

    8 of 429 announced prefixes have no ROA (RPKI not found): 121.58.96.0/19, 124.233.0.0/16, 203.12.95.0/24, 210.5.56.0/21, 2c0f:f7a8:9041::/48 (+3).

    Without a ROA, networks cannot tell your routes from a hijack.

    Fix: Create a ROA for each at your RIR portal, with origin AS4809 and a max length equal to the prefix length:

    121.58.96.0/19 AS4809 max-length /19
124.233.0.0/16 AS4809 max-length /16
203.12.95.0/24 AS4809 max-length /24
210.5.56.0/21 AS4809 max-length /21
2c0f:f7a8:9041::/48 AS4809 max-length /48
240e:7b6::/31 AS4809 max-length /31
240e:628:10::/45 AS4809 max-length /45
240e:ff:c027::/48 AS4809 max-length /48

    Open in RPKI / ROA validator Guide

  2. Warning

    5 of 429 announced prefixes have no IRR route object: 240e:628:10::/45, 203.25.52.0/24, 219.133.4.0/24, 61.141.239.0/24, 154.72.47.0/24.

    Many networks build their prefix filters from IRR data; without route objects some of them drop the routes.

    Fix: Create route (IPv4) and route6 (IPv6) objects with origin AS4809 in your RIR’s IRR database (or RADB).

    route6: 240e:628:10::/45
origin: AS4809

route: 203.25.52.0/24
origin: AS4809

route: 219.133.4.0/24
origin: AS4809

    Open in ASN & BGP prefix lookup

Checks

Routing and RPKI 8 of 429 announced prefixes have no ROA (RPKI not found): 121.58.96.0/19, 124.233.0.0/16, 203.12.95.0/24, 210.5.56.0/21, 2c0f:f7a8:9041::/48 (+3).
  • Pass: AS4809 announces 233 IPv4 and 196 IPv6 prefixes.
  • Warning: 8 of 429 announced prefixes have no ROA (RPKI not found): 121.58.96.0/19, 124.233.0.0/16, 203.12.95.0/24, 210.5.56.0/21, 2c0f:f7a8:9041::/48 (+3).
  • Info: 421 of 429 announced prefixes are RPKI valid.
  • Warning: 5 of 429 announced prefixes have no IRR route object: 240e:628:10::/45, 203.25.52.0/24, 219.133.4.0/24, 61.141.239.0/24, 154.72.47.0/24.
  • Info: 20 upstreams and peers, 43 downstream networks seen.
HolderCHINATELECOM-CORE-WAN-CN2 - China Telecom Next Generation Carrier Network
IPv4 prefixes233
IPv6 prefixes196
RPKI421 valid · 8 not found
Without IRR route object5
Downstream networks43
Routes to fix
PrefixRPKI
121.58.96.0/19 No ROA
124.233.0.0/16 No ROA
203.12.95.0/24 No ROA
210.5.56.0/21 No ROA
2c0f:f7a8:9041::/48 No ROA
240e:7b6::/31 No ROA
240e:628:10::/45 No ROA
240e:ff:c027::/48 No ROA

Upstreams and peers seen to the left 20

AS35710 weber.cloud AS23764 CTGNet AS1299 Arelion (Twelve99) AS3356 Lumen AS3356 AS2914 NTT Global IP Network AS4134 China Telecom AS9304 HGC AS4637 Telstra (International) AS812 Rogers Cable AS20485 TransTelecom AS6939 Hurricane Electric AS3491 PCCW Global

Announced prefixes 429

1.71.103.0/24 1.71.119.0/24 1.81.92.0/24 1.81.93.0/24 1.203.112.0/23 1.203.112.0/24 1.203.113.0/24 5.10.138.0/24 5.10.139.0/24 5.10.140.0/24 5.10.143.0/24 27.148.22.0/24 27.148.23.0/24 27.148.248.0/21 27.156.44.0/23 27.191.140.0/24 36.1.209.0/24 36.1.210.0/23 36.112.212.0/24 58.43.192.0/18 58.49.108.0/24 58.209.172.0/23 58.209.176.0/22 58.209.179.0/24 58.221.146.0/24 59.47.56.0/24 59.47.57.0/24 59.49.112.0/22 59.49.116.0/24 59.49.118.0/24 59.49.119.0/24 59.49.120.0/24 59.49.121.0/24 59.49.122.0/24 59.49.123.0/24 59.49.124.0/24 59.49.125.0/24 59.49.126.0/24 59.60.0.0/20 59.60.8.0/24 59.60.12.0/24 59.173.248.0/24 60.168.127.0/24 60.168.148.0/24 61.130.2.0/23 61.141.239.0/24 61.154.224.0/23 61.154.225.0/24 63.140.3.0/24 66.102.241.0/24 66.102.247.0/24 66.102.249.0/24 66.102.252.0/24 66.102.254.0/24 69.163.106.0/24 69.163.123.0/24 106.9.0.0/18 106.9.122.0/24 106.16.240.0/20 106.33.193.0/24 106.41.64.0/24 106.41.65.0/24 106.83.137.0/24 112.67.112.0/24 112.67.113.0/24 114.231.181.0/24 115.169.32.0/24 115.169.39.0/24 115.169.40.0/24 115.200.192.0/21 115.200.208.0/20 115.200.208.0/21 115.224.2.0/24 116.6.0.0/16 116.6.7.0/24 116.6.30.0/23 116.6.48.0/23 116.6.93.0/24 116.6.112.0/22 116.6.142.0/24 116.6.204.0/22 116.8.0.0/19 116.211.0.0/18 116.211.5.0/24 116.211.6.0/24 116.211.31.0/24 116.248.192.0/19 117.28.224.0/19 117.28.225.0/24 117.28.234.0/24 117.38.0.0/16 117.41.0.0/17 117.41.48.0/20 118.85.128.0/21 118.85.206.0/24 118.85.207.0/24 119.121.0.0/17 120.41.108.0/24 120.41.117.0/24 121.58.96.0/19

Showing the first 100.

Source: RIPEstat (RIPE NCC RIS, Routinator, IRR); AS names: Team Cymru

Open in ASN & BGP prefix lookup
Registration Found at rdap.apnic.net.
  • Pass: Found at rdap.apnic.net.
NameCHINATELECOM-CORE-WAN-CN2
HandleAS4809
RangeAS4809
CountryCN
Statusactive
Registered2008-09-04T06:40:27Z
Last changed2021-06-15T08:06:19Z
Abuse contactanti-spam@chinatelecom.cn
Allocation
Registry (RIR)APNIC
CountryChina (CN)
Delegated on1996-01-09
StatusAllocated
Delegated rangeAS4809 – AS4810

Source: RIR delegation data, updated daily. The country is where the range was registered, not necessarily where it is used.

Contacts
RoleNameEmail
abuse IRT-CHINANET-CN anti-spam@chinatelecom.cn
administrative, technical Chinanet Hostmaster anti-spam@chinatelecom.cn

Source: https://rdap.apnic.net/autnum/4809. Registration data from rdap.apnic.net, shown under its terms of use (terms): not for marketing or bulk collection.

Open in WHOIS / RDAP lookup
PeeringDB AS4809 is in PeeringDB as China Telecom / CN2.
  • Pass: AS4809 is in PeeringDB as China Telecom / CN2.
  • Info: Peering policy: Selective.
  • Info: Present at 2 internet exchanges with 2 ports (20G in total).
NetworkChina Telecom / CN2
AS numberAS4809
TypeNSP, Global
Websitehttp://en.chinatelecom.com.cn/
IRR as-setAS-CN2
Prefixes (IPv4 / IPv6)20000 / 3000
Traffic100-200Gbps, Balanced
Peering policySelective
LocationsPreferred
Ratio requiredNo
ContractsPrivate Only
Last updated2025-04-09
Contacts
NOCnoc@chinatelecomglobal.com

Source: PeeringDB. Results are cached for an hour.

Open in PeeringDB lookup