AS9002 RETN-AS RETN Limited

RETN-AS RETN Limited · registered in the United Kingdom

IPv4 addresses22,52821 prefixes · <0.001% of announced IPv4

Rank in United Kingdom#165largest network in GB by IPv4 space, of 2,074 · 0.03% of GB

Rank worldwide#5,740of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)1 prefixes

CountryUnited Kingdom2,261 ASNs registered there

Open AS9002 in ASN lookup Look up an IP in this network (45.39.107.1) All networks in United Kingdom

IPv4 prefixes

All 21 prefixes, in address order.

45.39.107.0/24
45.39.108.0/24
81.19.134.0/24
85.136.179.0/24
87.245.208.0/21
87.245.224.0/19
89.19.36.0/22
94.158.240.0/22
104.233.6.0/24
139.45.192.0/22
139.45.196.0/23
139.45.200.0/21
139.45.208.0/23
139.45.210.0/24
139.45.218.0/23
139.45.220.0/22
185.13.152.0/22
185.82.8.0/23
185.82.10.0/24
193.109.100.0/22
213.108.245.0/24

IPv6 prefixes

All 1 prefix.

2a02:2d8::/32

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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