AS17638 ASN for TIANJIN Provincial Net of CT

China CHINATELECOM-TJ-AS-AP APNIC 526 IPv4 prefixes 19 IPv6 prefixes

IPv4 addresses

715,776

IPv6 /48 networks

393,491

RPKI

534 valid4 invalid7 no ROA

Peers and downstreams

Holder

AS name: CHINATELECOM-TJ-AS-AP
Description: ASN for TIANJIN Provincial Net of CT
Organisation: ASN for TIANJIN Provincial Net of CT
Abuse contact: Not published
Assigned: 2002-11-17
Registered: 2008-09-04
Record last changed: 2020-05-14 11:13 UTC

106.47.0.0/16 106.47.0.0/23 106.47.10.0/24 106.47.100.0/24 106.47.101.0/24 106.47.102.0/24 106.47.103.0/24 106.47.108.0/24 106.47.109.0/24 106.47.11.0/24 106.47.110.0/24 106.47.111.0/24 106.47.112.0/24 106.47.113.0/24 106.47.114.0/24 106.47.115.0/24 106.47.116.0/24 106.47.117.0/24 106.47.118.0/24 106.47.119.0/24 106.47.12.0/22 106.47.120.0/22 106.47.124.0/24 106.47.125.0/24 106.47.126.0/24 106.47.127.0/24 106.47.128.0/22 106.47.132.0/22 106.47.136.0/23 106.47.138.0/23 106.47.140.0/23 106.47.142.0/23 106.47.144.0/24 106.47.145.0/24 106.47.146.0/24 106.47.147.0/24 106.47.148.0/22 106.47.152.0/23 106.47.154.0/23 106.47.156.0/23 106.47.158.0/23 106.47.16.0/24 106.47.160.0/22 106.47.164.0/22 106.47.168.0/22 106.47.17.0/24 106.47.172.0/22 106.47.176.0/23 106.47.178.0/24 106.47.18.0/24 106.47.180.0/23 106.47.182.0/23 106.47.184.0/24 106.47.185.0/24 106.47.186.0/24 106.47.187.0/24 106.47.188.0/24 106.47.189.0/24 106.47.19.0/24 106.47.190.0/24 106.47.191.0/24 106.47.192.0/23 106.47.194.0/23 106.47.196.0/23 106.47.198.0/23 106.47.2.0/23 106.47.20.0/22 106.47.200.0/23 106.47.202.0/23 106.47.208.0/24 106.47.209.0/24 106.47.210.0/24 106.47.211.0/24 106.47.212.0/24 106.47.216.0/23 106.47.218.0/23 106.47.220.0/24 106.47.222.0/23 106.47.24.0/22 106.47.28.0/22 106.47.32.0/22 106.47.36.0/22 106.47.4.0/23 106.47.40.0/22 106.47.44.0/22 106.47.48.0/22 106.47.52.0/24 106.47.53.0/24 106.47.54.0/23 106.47.56.0/24 106.47.57.0/24 106.47.58.0/24 106.47.59.0/24 106.47.6.0/23 106.47.60.0/24 106.47.61.0/24 106.47.62.0/24 106.47.63.0/24 106.47.64.0/24 106.47.65.0/24 106.47.66.0/24 106.47.67.0/24 106.47.68.0/24 106.47.69.0/24 106.47.70.0/24 106.47.71.0/24 106.47.72.0/24 106.47.73.0/24 106.47.74.0/24 106.47.75.0/24 106.47.76.0/24 106.47.77.0/24 106.47.78.0/24 106.47.79.0/24 106.47.8.0/24 106.47.80.0/24 106.47.81.0/24 106.47.89.0/24 106.47.9.0/24 106.47.90.0/23 106.47.92.0/24 106.47.93.0/24 106.47.94.0/24 106.47.95.0/24 106.47.96.0/24 106.47.97.0/24 106.47.98.0/24 106.47.99.0/24 123.150.0.0/15 123.150.0.0/16 123.150.103.0/24 123.150.109.0/24 123.150.11.0/24 123.150.12.0/22 123.150.14.0/24 123.150.141.0/24 123.150.143.0/24 123.150.145.0/24 123.150.147.0/24 123.150.16.0/20 123.150.220.0/23 123.150.222.0/23 123.150.242.0/24 123.150.253.0/24 123.150.254.0/24 123.150.255.0/24 123.150.34.0/24 123.150.37.0/24 123.150.4.0/24 123.150.43.0/24 123.150.46.0/24 123.150.57.0/24 123.150.6.0/24 123.150.65.0/24 123.150.7.0/24 123.150.81.0/24 123.150.92.0/24 123.150.95.0/24 123.150.96.0/24 123.151.0.0/16 123.151.0.0/17 123.151.0.0/21 123.151.112.0/24 123.151.113.0/24 123.151.126.0/23 123.151.128.0/21 123.151.130.0/23 123.151.146.0/24 123.151.147.0/24 123.151.162.0/24 123.151.163.0/24 123.151.17.0/24 123.151.173.0/24 123.151.192.0/19 123.151.21.0/24 123.151.224.0/19 123.151.24.0/24 123.151.89.0/24 125.213.32.0/20 139.220.192.0/24 139.220.193.0/24 139.220.194.0/24 139.220.195.0/24 139.220.240.0/24 139.220.241.0/24 139.220.242.0/24 139.220.243.0/24 180.212.0.0/15 180.212.0.0/24 180.212.1.0/24 180.212.100.0/22 180.212.104.0/22 180.212.108.0/22 180.212.112.0/24 180.212.113.0/24 180.212.114.0/24 180.212.115.0/24 180.212.116.0/23 180.212.118.0/24 180.212.12.0/22 180.212.120.0/21 180.212.128.0/22 180.212.132.0/23 180.212.134.0/23 180.212.136.0/23 180.212.138.0/24 180.212.139.0/24 180.212.141.0/24 180.212.142.0/24 180.212.143.0/24 180.212.144.0/23 180.212.146.0/24 180.212.147.0/24 180.212.152.0/23 180.212.155.0/24 180.212.156.0/22 180.212.16.0/22 180.212.160.0/23 180.212.162.0/24 180.212.163.0/24 180.212.166.0/23 180.212.168.0/21 180.212.176.0/23 180.212.178.0/23 180.212.182.0/24 180.212.183.0/24 180.212.184.0/22 180.212.188.0/22 180.212.192.0/21 180.212.2.0/23 180.212.20.0/23 180.212.200.0/21 180.212.208.0/22 180.212.212.0/22 180.212.224.0/23 180.212.226.0/23 180.212.228.0/23 180.212.230.0/23 180.212.232.0/23 180.212.234.0/24 180.212.235.0/24 180.212.236.0/22 180.212.24.0/23 180.212.240.0/24 180.212.241.0/24 180.212.242.0/23 180.212.244.0/22 180.212.244.0/23 180.212.248.0/22 180.212.252.0/23 180.212.254.0/24 180.212.28.0/22 180.212.32.0/24 180.212.33.0/24 180.212.35.0/24 180.212.4.0/23 180.212.40.0/22 180.212.44.0/22 180.212.48.0/24 180.212.49.0/24 180.212.50.0/24 180.212.56.0/23 180.212.58.0/23 180.212.6.0/23 180.212.64.0/20 180.212.64.0/23 180.212.66.0/23 180.212.68.0/23 180.212.70.0/23 180.212.76.0/23 180.212.78.0/23 180.212.8.0/22 180.212.80.0/23 180.212.83.0/24 180.212.84.0/22 180.212.88.0/22 180.212.92.0/22 180.212.96.0/22 180.213.10.0/24 180.213.12.0/24 180.213.13.0/24 180.213.144.0/22 180.213.148.0/22 180.213.27.0/24 180.213.28.0/24 180.213.29.0/24 180.213.30.0/24 180.213.38.0/24 180.213.68.0/22 180.213.96.0/22 202.143.16.0/23 218.30.175.0/24 218.30.189.0/24 219.150.32.0/20 219.150.48.0/20 219.150.50.0/24 219.150.53.0/24 219.150.64.0/20 219.150.80.0/20 219.150.86.0/24 219.150.96.0/20 219.150.96.0/24 221.238.0.0/18 221.238.11.0/24 221.238.114.0/24 221.238.128.0/18 221.238.13.0/24 221.238.140.0/24 221.238.141.0/24 221.238.147.0/24 221.238.148.0/24 221.238.15.0/24 221.238.151.0/24 221.238.152.0/24 221.238.153.0/24 221.238.175.0/24 221.238.176.0/24 221.238.187.0/24 221.238.192.0/18 221.238.202.0/24 221.238.203.0/24 221.238.204.0/24 221.238.206.0/24 221.238.208.0/24 221.238.214.0/24 221.238.217.0/24 221.238.219.0/24 221.238.220.0/24 221.238.231.0/24 221.238.232.0/24 221.238.234.0/24 221.238.237.0/24 221.238.240.0/24 221.238.242.0/24 221.238.33.0/24 221.238.4.0/24 221.238.40.0/24 221.238.59.0/24 221.238.6.0/24 221.238.64.0/18 221.238.64.0/24 221.238.71.0/24 221.238.82.0/24 221.239.0.0/18 221.239.0.0/24 221.239.101.0/24 221.239.103.0/24 221.239.116.0/24 221.239.117.0/24 221.239.121.0/24 221.239.16.0/24 221.239.18.0/24 221.239.19.0/24 221.239.21.0/24 221.239.23.0/24 221.239.24.0/24 221.239.26.0/24 221.239.27.0/24 221.239.28.0/24 221.239.29.0/24 221.239.30.0/24 221.239.44.0/24 221.239.45.0/24 221.239.5.0/24 221.239.53.0/24 221.239.54.0/24 221.239.55.0/24 221.239.57.0/24 221.239.58.0/24 221.239.59.0/24 221.239.6.0/24 221.239.62.0/24 221.239.64.0/18 221.239.65.0/24 221.239.66.0/24 221.239.71.0/24 221.239.75.0/24 221.239.8.0/24 221.239.86.0/24 221.239.87.0/24 221.239.88.0/24 221.239.89.0/24 221.239.9.0/24 221.239.90.0/24 221.239.91.0/24 221.239.93.0/24 221.239.95.0/24 221.239.97.0/24 36.106.0.0/17 36.106.1.0/24 36.106.10.0/24 36.106.100.0/22 36.106.104.0/23 36.106.106.0/23 36.106.108.0/22 36.106.11.0/24 36.106.116.0/22 36.106.12.0/24 36.106.120.0/22 36.106.124.0/22 36.106.128.0/17 36.106.128.0/22 36.106.13.0/24 36.106.132.0/22 36.106.136.0/24 36.106.137.0/24 36.106.138.0/24 36.106.139.0/24 36.106.14.0/24 36.106.140.0/23 36.106.142.0/24 36.106.143.0/24 36.106.144.0/22 36.106.148.0/23 36.106.15.0/24 36.106.150.0/24 36.106.151.0/24 36.106.152.0/22 36.106.156.0/23 36.106.158.0/23 36.106.160.0/23 36.106.162.0/23 36.106.164.0/23 36.106.166.0/23 36.106.168.0/22 36.106.17.0/24 36.106.176.0/23 36.106.178.0/23 36.106.180.0/22 36.106.19.0/24 36.106.196.0/23 36.106.198.0/23 36.106.20.0/24 36.106.22.0/23 36.106.220.0/22 36.106.224.0/22 36.106.228.0/22 36.106.232.0/22 36.106.236.0/22 36.106.24.0/24 36.106.240.0/24 36.106.241.0/24 36.106.242.0/24 36.106.243.0/24 36.106.244.0/23 36.106.246.0/23 36.106.248.0/22 36.106.25.0/24 36.106.252.0/22 36.106.26.0/24 36.106.27.0/24 36.106.28.0/22 36.106.34.0/24 36.106.39.0/24 36.106.4.0/24 36.106.40.0/23 36.106.42.0/24 36.106.43.0/24 36.106.44.0/24 36.106.45.0/24 36.106.46.0/24 36.106.47.0/24 36.106.48.0/22 36.106.5.0/24 36.106.52.0/22 36.106.56.0/22 36.106.6.0/24 36.106.60.0/22 36.106.64.0/22 36.106.68.0/22 36.106.72.0/22 36.106.76.0/22 36.106.8.0/24 36.106.80.0/22 36.106.84.0/22 36.106.9.0/24 36.106.96.0/22 42.122.0.0/16 42.122.0.0/21 42.122.12.0/22 42.122.128.0/22 42.122.132.0/22 42.122.140.0/22 42.122.144.0/21 42.122.152.0/22 42.122.156.0/22 42.122.160.0/21 42.122.184.0/22 42.122.188.0/22 42.122.200.0/22 42.122.204.0/22 42.122.208.0/22 42.122.212.0/22 42.122.216.0/22 42.122.220.0/22 42.122.225.0/24 42.122.226.0/24 42.122.228.0/22 42.122.232.0/21 42.122.240.0/21 42.122.248.0/23 42.122.250.0/23 42.122.252.0/22 42.122.40.0/22 42.122.44.0/22 42.122.48.0/22 42.122.52.0/22 42.122.64.0/18 42.122.8.0/22 42.80.0.0/15 42.80.20.0/23 42.80.216.0/24 42.80.218.0/24 42.80.219.0/24 42.80.239.0/24 42.80.30.0/24 42.80.31.0/24 42.80.33.0/24 42.80.41.0/24 42.80.42.0/24 42.80.43.0/24 42.81.37.0/24 42.81.38.0/23 42.81.40.0/23 42.81.78.0/24 42.81.79.0/24

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade C · 69/100

partly	Prefixes covered by valid ROAs 534 of 545 announced prefixes are RPKI valid, 7 have no ROA.	24/25
fail	No RPKI invalid announcements 4 announced prefixes are RPKI invalid and dropped by networks that validate.	0/10
pass	Announces IPv6 19 IPv6 prefixes.	15/15
partly	More than one upstream 1 upstream seen in BGP.	5/10
pass	Working abuse contact anti-spam@chinatelecom.cn is published.	15/15
fail	Publishes a geofeed No geofeed found. Without one, location databases have to guess.	0/10
pass	No prefixes smaller than /24 or /48 All prefixes are /24 (IPv4) or /48 (IPv6) or larger.	10/10
fail	Registry record maintained Last changed 2020-05-14.	0/5

Built from the announced prefixes, RPKI, the registry record and geofeeds. Checks without data are not counted. Also in the API.

Show this on your website

HTML

<a href="https://ip-fd.net/asn/17638"><img src="https://ip-fd.net/badge/asn/17638/health.svg" alt="AS17638 network health on IP-FD.net"></a>

Markdown

[![AS17638 network health](https://ip-fd.net/badge/asn/17638/health.svg)](https://ip-fd.net/asn/17638)

Use rpki.svg instead of health.svg for the RPKI badge.

Routing changes

Last 30 days

2026-10-04 14:50 UTC	Prefix gone	36.106.240.0/22
2026-10-04 14:50 UTC	Prefix gone	139.220.240.0/22
2026-10-04 14:50 UTC	Prefix gone	139.220.194.0/23
2026-10-04 14:50 UTC	Prefix gone	139.220.192.0/23
2026-10-04 14:50 UTC	New prefix	36.106.242.0/24
2026-10-04 14:50 UTC	New prefix	36.106.243.0/24
2026-10-04 14:50 UTC	New prefix	139.220.192.0/24
2026-10-04 14:50 UTC	New prefix	139.220.243.0/24
2026-10-04 14:50 UTC	New prefix	139.220.195.0/24
2026-10-04 14:50 UTC	New prefix	36.106.241.0/24
2026-10-04 14:50 UTC	New prefix	139.220.240.0/24
2026-10-04 14:50 UTC	New prefix	36.106.240.0/24
2026-10-04 14:50 UTC	New prefix	139.220.241.0/24
2026-10-04 14:50 UTC	New prefix	139.220.193.0/24
2026-10-04 14:50 UTC	New prefix	139.220.194.0/24
2026-10-04 14:50 UTC	New prefix	139.220.242.0/24

WHOIS

aut-num:        AS17638
as-name:        CHINATELECOM-TJ-AS-AP
handle:         AS17638
remarks:        ASN for TIANJIN Provincial Net of CT
remarks:        For routing problems with this ASN contact the ADMIN-C
abuse:          IRT-CHINANET-CN (IRT-CHINANET-CN) <anti-spam@chinatelecom.cn>
technical:      YY246-AP (yuan yu) <yuyuan@cndata.com>
administrative: CH93-AP (Chinanet Hostmaster) <anti-spam@chinatelecom.cn>
registration:   2008-09-04T06:40:34Z
last changed:   2020-05-14T11:13:34Z
source:         APNIC (RDAP)

Routing data

Updated just now

Registry record

Fetched just now from APNIC RDAP

Prefixes and neighbours come from the RIPE RIS route collectors. Data older than 5 minutes is refreshed when this page is opened.

API

curl -H "X-API-Key: YOUR_KEY" https://ip-fd.net/api/v1/asn/17638

const res = await fetch('https://ip-fd.net/api/v1/asn/17638', {
  headers: { 'X-API-Key': 'YOUR_KEY' }
});
const data = await res.json();
console.log(data);

import requests

r = requests.get('https://ip-fd.net/api/v1/asn/17638', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/17638');
curl_setopt($ch, CURLOPT_HTTPHEADER, ['X-API-Key: YOUR_KEY']);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$data = json_decode(curl_exec($ch), true);
print_r($data);

req, _ := http.NewRequest("GET", "https://ip-fd.net/api/v1/asn/17638", nil)
req.Header.Set("X-API-Key", "YOUR_KEY")
res, err := http.DefaultClient.Do(req)
if err != nil {
    log.Fatal(err)
}
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))

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