123.151.21.0/24

AS17638 · ASN for TIANJIN Provincial Net of CT

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Summary

Country	China
Domain	chinatelecom.cn
ASN	AS17638
Parent Range	123.150.0.0/15
Registry	APNIC
ID	TIANJIN-TIANJINDAXUE-SCHOOL

WHOIS Details

inetnum:        123.151.21.0 - 123.151.21.255
netname:        TIANJIN-TIANJINDAXUE-SCHOOL
descr:          TIANJINDAXUE-SCHOOL
descr:          TIANJIN CITY
country:        CN
admin-c:        AT370-AP
tech-c:         AT370-AP
abuse-c:        AC2531-AP
status:         ASSIGNED NON-PORTABLE
mnt-by:         MAINT-CHINANET-TJ
mnt-irt:        IRT-CHINANET-TJ
last-modified:  2022-01-12T13:25:10Z
source:         APNIC

irt:            IRT-CHINANET-TJ
address:        No.11 LIUJING ROAD ,HEDONG ,TIANJIN,CHINA
e-mail:         baijian.tj@chinatelecom.cn
abuse-mailbox:  baijian.tj@chinatelecom.cn
admin-c:        AT370-AP
tech-c:         AT370-AP
auth:           # Filtered
remarks:        baijian.tj@chinatelecom.cn
remarks:        baijian.tj@chinatelecom.cn was validated on 2025-11-21
mnt-by:         MAINT-CHINANET-TJ
last-modified:  2025-11-21T07:44:25Z
source:         APNIC

role:           ABUSE CHINANETTJ
country:        ZZ
address:        No.11 LIUJING ROAD ,HEDONG ,TIANJIN,CHINA
phone:          +000000000
e-mail:         baijian.tj@chinatelecom.cn
admin-c:        AT370-AP
tech-c:         AT370-AP
nic-hdl:        AC2531-AP
remarks:        Generated from irt object IRT-CHINANET-TJ
remarks:        baijian.tj@chinatelecom.cn was validated on 2025-11-21
abuse-mailbox:  baijian.tj@chinatelecom.cn
mnt-by:         APNIC-ABUSE
last-modified:  2025-11-21T07:45:04Z
source:         APNIC

person:         admin tjtele
nic-hdl:        AT370-AP
e-mail:         tjipback@yahoo.com
address:        No.11 LIUJING ROAD ,HEDONG ,TIANJIN,CHINA
phone:          +86-22-85580499
fax-no:         +86-22-85580970
country:        CN
mnt-by:         MAINT-CHINANET-TJ
last-modified:  2014-04-01T03:31:13Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 123.151.21.0/24

Range	ASN	Company	Num of IPs
123.150.0.0/15	AS17638	CHINANET TIANJIN PROVINCE NETWORK	131,072
123.150.0.0/15	AS4809	CHINANET TIANJIN PROVINCE NETWORK	131,072
123.150.0.0/15	AS58542	CHINANET TIANJIN PROVINCE NETWORK	131,072

Nearby Ranges

BGP prefixes that overlap with 123.151.0.0/16

Range	ASN	Company	Num of IPs
123.150.0.0/15	AS17638	CHINANET TIANJIN PROVINCE NETWORK	131,072
123.150.0.0/15	AS4809	CHINANET TIANJIN PROVINCE NETWORK	131,072
123.150.0.0/15	AS58542	CHINANET TIANJIN PROVINCE NETWORK	131,072
123.151.48.0/20	AS58542	GUOXINBEILIN-LTD	4,096
123.151.96.0/20	AS58542	GUOXINBEILIN-LTD	4,096
123.151.128.0/21	AS17638	GUOXINBEILIN-LTD	2,048
123.151.152.0/22	AS58542	HAOWEIGAOKE-LTD	1,024
123.151.92.0/22	AS58542	JUNDETONGXUN-LTD	1,024
123.151.148.0/22	AS58542	HAOWEIGAOKE-LTD	1,024
123.151.146.0/24	AS17638	XINXIGANG-LTD	256
123.151.144.0/24	AS58542	TIANJINCHANGKUAN-LTD	256
123.151.147.0/24	AS17638	HAOWEIGAOKE-LTD	256

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

Read more

Pingable IPs

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
177.159.240.8	AS18881 TELEFÔNICA BRASIL S.A	`2.79ms` from Brasilia, BR
144.58.112.40	AS2003 Electric Power Research Institute	`2.73ms` from Charlotte, US
3.23.116.232	AS16509 Amazon.com, Inc.	`0.17ms` from Columbus, US
107.135.232.40	AS7018 AT&T Enterprises, LLC	`5.93ms` from Houston, US
168.4.134.168	AS8 Rice University	`3.41ms` from Houston, US
123.41.17.8	AS45985 SamsungSDS Inc.	`1.56ms` from Incheon, KR
2.97.68.72	AS13285 TalkTalk Communications Limited	`1.37ms` from London, GB
86.143.221.104	AS2856 British Telecommunications PLC	`6.39ms` from London, GB
92.157.101.24	AS3215 Orange S.A.	`10.17ms` from Marseille, FR
134.238.173.104	AS394089 Google LLC	`1.06ms` from Moncks Corner, US
95.220.216.168	AS12714 PJSC MegaFon	`2.03ms` from Moscow, RU
96.232.163.88	AS701 Verizon Business	`2.70ms` from New York City, US
111.97.81.200	AS2516 KDDI CORPORATION	`13.82ms` from Osaka, JP
45.8.233.248	AS41765 IPGarde SAS	`7.84ms` from Paris, FR
109.229.174.72	AS51997 LLP Asket	`7.12ms` from Astana, KZ
104.59.46.40	AS7018 AT&T Enterprises, LLC	`7.10ms` from Atlanta, US
65.57.251.56	AS14127 Iland Internet Solutions Corporation	`1.08ms` from Dallas, US
52.178.188.136	AS8075 Microsoft Corporation	`0.15ms` from Dublin, IE
138.2.164.40	AS31898 Oracle Corporation	`0.36ms` from Frankfurt am Main, DE
107.150.103.24	AS135377 UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED	`0.18ms` from Los Angeles, US
104.34.39.232	AS20001 Charter Communications Inc	`5.82ms` from Los Angeles, US
179.26.12.232	AS6057 Administracion Nacional de Telecomunicaciones	`1.73ms` from Montevideo, UY
126.142.53.8	AS17676 SoftBank Corp.	`4.03ms` from Osaka, JP
79.27.153.200	AS3269 Telecom Italia S.p.A.	`5.37ms` from Rome, IT
115.6.218.40	AS4766 Korea Telecom	`7.87ms` from Seoul, KR

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

traceroute -a -n -q1 -f3 -m12 123.151.21.173

traceroute to 123.151.21.173 (123.151.21.173): 12 hops max, 52 byte packets

3 [AS3356] 4.15.125.54 32.227 ms

4 *

5 [AS4134] 202.97.54.33 172.374 ms

6 *

7 *

8 *

9 [AS17638] 219.150.49.58 179.5 ms

10 *

11 *

12 *

Measurement taken from

IPinfo ProbeNet in Casper, US

On January 30th 2026

What are IP address ranges?

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