AS204509 SYN SEINE ET YVELINES NUMERIQUE

SYN SEINE ET YVELINES NUMERIQUE · registered in France

IPv4 addresses1,0241 prefixes · <0.001% of announced IPv4

Rank in France#716largest network in FR by IPv4 space, of 1,375 · <0.01% of FR

Rank worldwide#40,028of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryFrance1,474 ASNs registered there

Open AS204509 in ASN lookup Look up an IP in this network (193.239.12.1) All networks in France

IPv4 prefixes

All 1 prefix, in address order.

193.239.12.0/22

Similar-sized networks in France

ASNNameIPv4 addresses

AS204207#713 Devanlay LACOSTE OPERATIONS S.A.1,024

AS204439#714 SEPHORA-EMEA SEPHORA SAS1,024

AS204460#715 Stordata-AS Stordata SA1,024

AS204657#717 ASUBI UBICENTREX SAS1,024

AS204733#718 FMI FMI TELECOM SRL1,024

AS204756#719 Timaca TIMACA SARL1,024

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