AS139903 RETN Telecoms Ltd.

RETN-AS-AP - RETN Telecoms Ltd. · registered in Taiwan

IPv4 addresses5121 prefixes · <0.001% of announced IPv4

Rank in Taiwan#175largest network in TW by IPv4 space, of 237 · <0.01% of TW

Rank worldwide#48,649of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryTaiwan288 ASNs registered there

Open AS139903 in ASN lookup Look up an IP in this network (103.146.250.1) All networks in Taiwan

IPv4 prefixes

All 1 prefix, in address order.

103.146.250.0/23

IPv6 prefixes

All 1 prefix.

2001:df2:7580::/48

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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