AS31503 ASMasterIT Master IT Ltd.

ASMasterIT Master IT Ltd. · registered in Russia

IPv4 addresses2,0481 prefixes · <0.001% of announced IPv4

Rank in Russia#1,374largest network in RU by IPv4 space, of 4,937 · <0.01% of RU

Rank worldwide#23,146of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryRussia4,993 ASNs registered there

Open AS31503 in ASN lookup Look up an IP in this network (91.244.160.1) All networks in Russia

IPv4 prefixes

All 1 prefix, in address order.

91.244.160.0/21

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AS34644#1376 EXTEL-AS PJSC "Vimpelcom"2,048

AS34829#1377 NaukaVidnoe LLC "Nauka-Svyaz"2,048

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