AS21453 FLEX-AS Flex Ltd.

FLEX-AS Flex Ltd. · registered in Russia

IPv4 addresses117,24827 prefixes · 0.004% of announced IPv4

Rank in Russia#47largest network in RU by IPv4 space, of 4,937 · 0.27% of RU

Rank worldwide#1,735of 79,396 networks with IPv4

IPv64 x /32 (262,144 x /48)1 prefixes

CountryRussia4,993 ASNs registered there

Open AS21453 in ASN lookup Look up an IP in this network (31.31.64.1) All networks in Russia

IPv4 prefixes

All 27 prefixes, in address order.

31.31.64.0/21
80.84.112.0/20
80.252.128.0/19
88.84.192.0/24
88.84.194.0/23
88.84.196.0/22
88.84.200.0/21
88.84.209.0/24
88.84.210.0/23
88.84.212.0/22
88.84.216.0/21
94.253.0.0/23
94.253.2.0/24
94.253.3.0/24
94.253.4.0/22
94.253.8.0/21
94.253.16.0/20
94.253.32.0/19
94.253.64.0/20
94.253.96.0/21
94.253.104.0/21
94.253.112.0/20
95.183.64.0/18
178.57.224.0/19
178.167.0.0/17
185.5.148.0/22
212.7.224.0/19

IPv6 prefixes

All 1 prefix.

2a01:4200::/30

Similar-sized networks in Russia

ASNNameIPv4 addresses

AS12772#44 ENFORTA-AS JSC "ER-Telecom Holding"120,064

AS25490#45 STC-AS PJSC Rostelecom119,040

AS3267#46 niks SCIENTIFIC RESEARCH INSTITUTE FOR SYSTEM ANALYSIS OF THE NATIONAL RESEARCH CENTRE "KURCHATOV INSTITUTE"118,784

AS197695#48 AS-REGRU "Domain names registrar REG.RU", Ltd116,224

AS198610#49 BEGET-AS Beget LLC115,968

AS34533#50 ESAMARA-AS JSC "ER-Telecom Holding"104,704

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources