AS8399 SEWAN-FR SEWAN SAS

SEWAN-FR SEWAN SAS · registered in France

IPv4 addresses165,37648 prefixes · 0.005% of announced IPv4

Rank in France#17largest network in FR by IPv4 space, of 1,375 · 0.23% of FR

Rank worldwide#1,232of 79,396 networks with IPv4

IPv625 x /32 (1,638,400 x /48)4 prefixes

CountryFrance1,474 ASNs registered there

Open AS8399 in ASN lookup Look up an IP in this network (37.97.64.1) All networks in France

IPv4 prefixes

All 48 prefixes, in address order.

37.97.64.0/19
37.97.96.0/20
37.139.120.0/21
65.39.64.0/19
80.251.96.0/21
80.251.104.0/22
81.93.0.0/19
88.213.224.0/19
155.2.128.0/19
157.143.128.0/18
157.143.192.0/19
157.143.224.0/20
157.143.240.0/21
178.174.96.0/21
178.174.104.0/23
178.174.110.0/23
178.255.160.0/21
185.6.92.0/22
185.8.252.0/22
185.24.140.0/22
185.32.208.0/22
185.42.176.0/22
185.50.52.0/22
185.65.248.0/22
185.76.216.0/22
185.218.208.0/22
185.249.20.0/22
193.142.158.0/24
195.135.0.0/21
195.135.8.0/22
195.135.12.0/23
195.135.14.0/23
195.135.16.0/20
195.135.32.0/20
195.135.48.0/24
195.135.49.0/24
195.135.50.0/23
195.135.52.0/22
195.135.56.0/21
195.135.64.0/18
217.74.96.0/20
217.181.128.0/18
217.181.192.0/19
217.181.224.0/20
217.181.240.0/21
217.181.248.0/23
217.181.250.0/24
217.181.254.0/23

IPv6 prefixes

All 4 prefixes.

2a02:6e8::/32
2a02:c440::/29
2a05:5cc0::/29
2a0b:e3c0::/29

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AS8362#19 NordNet SA151,040

AS41272#20 MOSELLE-TELECOM-AS MOSELLE TELECOM147,456

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