37.21.0.0/17

AS12389 · PJSC Rostelecom

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Summary

Country	Russia
Domain	rostelecom.ru
ASN	AS12389
Parent Range	37.20.0.0/14
Registry	RIPE
ID	WEBSTREAM

WHOIS Details

inetnum:        37.21.0.0 - 37.21.63.255
netname:        WEBSTREAM
descr:          JSC Rostelecom regional branch Siberia
remarks:        Chita broadband service
country:        RU
remarks:        
remarks:        NCC
remarks:        INFRA-AW
remarks:        
admin-c:        NSOE11-RIPE
tech-c:         NSOE22-RIPE
mnt-by:         ROSTELECOM-MNT
status:         ASSIGNED PA
remarks:        
remarks:        Direct reference for the general info on spam,
remarks:        In unsoluble cases for the general info on spam,
remarks:        abusing & hacking complaints email [email protected] .
remarks:        
notify:         [email protected]
created:        2012-01-12T01:59:55Z
last-modified:  2025-06-27T09:40:00Z
source:         RIPE
abuse-email:    [email protected]
abuse-c:        RTNC-RIPE
abuse-org:      ORG-JR8-RIPE

role:           NSOELSVZ admin-c role
address:        JSC Sibirtelecom
address:        18, Ordjenikidze str.,
address:        630099, Novosibirsk, Russia
phone:          +7 383 2 270669
fax-no:         +7 383 2 270017
e-mail:         [email protected]
admin-c:        YOL1-RIPE
admin-c:        VIK15-RIPE
tech-c:         YOL1-RIPE
tech-c:         VIK15-RIPE
nic-hdl:        NSOE11-RIPE
notify:         [email protected]
mnt-by:         NSOELSV-NCC
created:        2005-03-29T04:58:27Z
last-modified:  2008-09-08T05:37:10Z
source:         RIPE

role:           NSOELSVZ tech-c role
address:        JSC Sibirtelecom
address:        18, Ordjenikidze str.,
address:        630099, Novosibirsk, Russia
phone:          +7 383 2 270669
fax-no:         +7 383 2 270017
e-mail:         [email protected]
admin-c:        YOL1-RIPE
admin-c:        VIK15-RIPE
tech-c:         YOL1-RIPE
tech-c:         VIK15-RIPE
nic-hdl:        NSOE22-RIPE
notify:         [email protected]
mnt-by:         NSOELSV-NCC
created:        2005-03-29T04:55:41Z
last-modified:  2008-09-08T05:37:11Z
source:         RIPE

route:          37.21.0.0/17
descr:          Rostelecom networks
origin:         AS12389
notify:         [email protected]
mnt-by:         ROSTELECOM-MNT
created:        2018-09-28T10:39:20Z
last-modified:  2018-09-28T10:39:20Z
source:         RIPE

Overlapping Ranges

BGP prefixes that contain 37.21.0.0/17

Range	ASN	Company	Num of IPs
37.20.0.0/14	AS12389	PJSC Rostelecom	262,144

Nearby Ranges

BGP prefixes that overlap with 37.21.0.0/16

Range	ASN	Company	Num of IPs
37.20.0.0/14	AS12389	PJSC Rostelecom	262,144
37.21.128.0/18	AS12389	JSC Rostelecom regional branch Siberia	16,384
37.21.192.0/18	AS12389	JSC Rostelecom regional branch Siberia	16,384

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

11,785 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
37.21.6.97	AS12389 PJSC Rostelecom	`25.24ms` from Krasnoyarsk, RU
37.21.9.151	AS12389 PJSC Rostelecom	`25.67ms` from Krasnoyarsk, RU
37.21.5.80	AS12389 PJSC Rostelecom	`25.16ms` from Krasnoyarsk, RU
37.21.10.66	AS12389 PJSC Rostelecom	`25.04ms` from Krasnoyarsk, RU
37.21.3.198	AS12389 PJSC Rostelecom	`24.99ms` from Krasnoyarsk, RU
37.21.8.137	AS12389 PJSC Rostelecom	`25.39ms` from Krasnoyarsk, RU
37.21.0.195	AS12389 PJSC Rostelecom	`25.41ms` from Krasnoyarsk, RU
37.21.2.186	AS12389 PJSC Rostelecom	`25.20ms` from Krasnoyarsk, RU
37.21.1.61	AS12389 PJSC Rostelecom	`25.23ms` from Krasnoyarsk, RU
37.21.7.147	AS12389 PJSC Rostelecom	`25.36ms` from Krasnoyarsk, RU
37.21.4.46	AS12389 PJSC Rostelecom	`25.27ms` from Krasnoyarsk, RU
37.21.67.23	AS12389 PJSC Rostelecom	`25.42ms` from Krasnoyarsk, RU
37.21.29.12	AS12389 PJSC Rostelecom	`25.35ms` from Krasnoyarsk, RU
37.21.19.138	AS12389 PJSC Rostelecom	`25.58ms` from Krasnoyarsk, RU
37.21.25.144	AS12389 PJSC Rostelecom	`25.71ms` from Krasnoyarsk, RU
37.21.23.202	AS12389 PJSC Rostelecom	`25.28ms` from Krasnoyarsk, RU
37.21.13.214	AS12389 PJSC Rostelecom	`25.19ms` from Krasnoyarsk, RU
37.21.14.99	AS12389 PJSC Rostelecom	`25.61ms` from Krasnoyarsk, RU
37.21.87.166	AS12389 PJSC Rostelecom	`25.19ms` from Krasnoyarsk, RU
37.21.127.139	AS12389 PJSC Rostelecom	`24.85ms` from Krasnoyarsk, RU
37.21.73.141	AS12389 PJSC Rostelecom	`25.22ms` from Krasnoyarsk, RU
37.21.123.27	AS12389 PJSC Rostelecom	`25.11ms` from Krasnoyarsk, RU
37.21.47.98	AS12389 PJSC Rostelecom	`25.04ms` from Krasnoyarsk, RU
37.21.81.223	AS12389 PJSC Rostelecom	`25.16ms` from Krasnoyarsk, RU
37.21.11.162	AS12389 PJSC Rostelecom	`25.33ms` from Krasnoyarsk, RU

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
85.147.102.1	AS33915 Vodafone Libertel B.V.	`5.17ms` from Amsterdam, NL
73.152.254.1	AS7922 Comcast Cable Communications, LLC	`6.88ms` from Ashburn, US
73.99.72.1	AS7922 Comcast Cable Communications, LLC	`7.42ms` from Ashburn, US
174.85.223.33	AS20115 Charter Communications LLC	`16.64ms` from Atlanta, US
79.101.94.1	AS8400 TELEKOM SRBIJA a.d.	`1.59ms` from Belgrade, RS
178.23.123.1	AS50372 Planetary Networks GmbH	`0.42ms` from Berlin, DE
208.65.166.1	AS36316 GoNetSpeed	`6.98ms` from Boston, US
187.28.112.193	AS4230 CLARO S.A.	`15.06ms` from Brasilia, BR
218.88.168.1	AS4134 CHINANET-BACKBONE	`6.42ms` from Chengdu, CN
198.37.194.1	AS10796 Charter Communications Inc	`13.52ms` from Chicago, US
40.137.219.129	AS7029 Windstream Communications LLC	`0.83ms` from Chicago, US
113.207.124.161	AS4837 CHINA UNICOM China169 Backbone	`1.96ms` from Chongqing, CN
167.100.57.1	AS397803 Hanson Communications, Inc.	`2.78ms` from Columbus, US
2.109.99.65	AS3292 TDC Holding A/S	`3.78ms` from Copenhagen, DK
60.19.20.1	AS4837 CHINA UNICOM China169 Backbone	`12.36ms` from Dalian, CN
173.219.127.1	AS19108 Optimum	`16.45ms` from Dallas, US
47.187.230.1	AS5650 Frontier Communications of America, Inc.	`2.50ms` from Dallas, US
207.126.86.1	AS6939 Hurricane Electric LLC	`0.32ms` from Dallas, US
12.217.20.241	AS7018 AT&T Enterprises, LLC	`1.25ms` from Dallas, US
12.26.10.177	AS7018 AT&T Enterprises, LLC	`1.12ms` from Dallas, US
12.138.127.193	AS7018 AT&T Enterprises, LLC	`1.32ms` from Dallas, US
59.89.136.1	AS9829 National Internet Backbone	`10.72ms` from Delhi, IN
172.168.203.97	AS8075 Microsoft Corporation	`0.21ms` from Des Moines, US
86.30.143.1	AS5089 Virgin Media Limited	`1.72ms` from Erith, GB
80.155.148.17	AS3320 Deutsche Telekom AG	`0.60ms` from Frankfurt am Main, DE

Traceroute

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

traceroute -a -n -q1 -f2 37.21.12.20

traceroute to 37.21.12.20 (37.21.12.20): 64 hops max, 52 byte packets

2 [AS15169] 192.178.241.242 141.074 ms

3 *

4 [AS12389] 185.140.149.207 217.45 ms

5 *

6 [AS12389] 37.21.12.20 230.626 ms

Measurement taken from

IPinfo ProbeNet in Dallas, US

On December 14th 2025

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

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