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AS17421

AS17421 is Mobile Business Group.

Last updated 3 Nov 2026 from DB-IP ASN Lite (2026-11-01) and RIR statistics (3 Nov 2026)

Short answer

AS17421 belongs to Mobile Business Group. DB-IP Lite attributes 1,655,808 IPv4 addresses in 34 ranges and 1 IPv6 ranges to it, all or nearly all of the IPv4 space in Taiwan. The number is registered with APNIC in Taiwan on 16 Oct 2000.

Facts for AS17421
Operator (DB-IP)Mobile Business Group
IPv4 addresses1,655,808
IPv4 ranges34
IPv6 ranges1
RegistryAPNIC
Registered16 Oct 2000
Registry countryTaiwan (TW)

Does it publish a geofeed?

We haven’t checked this network’s registry records for a geofeed yet. The Truth Check looks for one live for any address you test.

Shared addresses (CGNAT)

Mobile Business Group hasn’t been documented as using carrier-grade NAT in a source we could check. To see whether your own connection is behind it, compare your router’s address on the CGNAT check.

IPv6

DB-IP lists 1 IPv6 ranges for AS17421, so customers can get IPv6 addresses, which databases place separately from IPv4.

Where its IPv4 space is used, according to DB-IP

TW100%

Share of the network’s IPv4 addresses by DB-IP Country Lite. IP Geolocation by DB-IP.

IP ranges

RangeAs CIDRAddresses
42.70.0.0 – 42.79.255.25542.70.0.0/15, 42.72.0.0/13655,360
111.70.0.0 – 111.70.63.255111.70.0.0/1816,384
111.71.0.0 – 111.71.191.255111.71.0.0/17, 111.71.128.0/1849,152
111.71.193.0 – 111.71.197.255111.71.193.0/24, 111.71.194.0/23 …1,280
111.71.208.0 – 111.71.209.255111.71.208.0/23512
111.71.212.0 – 111.71.218.255111.71.212.0/22, 111.71.216.0/23 …1,792
111.71.220.0 – 111.71.223.255111.71.220.0/221,024
111.71.225.0 – 111.71.230.255111.71.225.0/24, 111.71.226.0/23 …1,536
111.71.240.0 – 111.71.240.255111.71.240.0/24256
111.71.242.0 – 111.71.243.255111.71.242.0/23512
111.71.248.0 – 111.71.248.255111.71.248.0/24256
111.71.252.0 – 111.71.254.255111.71.252.0/23, 111.71.254.0/24768
111.80.0.0 – 111.83.255.255111.80.0.0/14262,144
114.136.0.0 – 114.137.255.255114.136.0.0/15131,072
116.59.0.0 – 116.59.0.255116.59.0.0/24256
116.59.2.0 – 116.59.2.255116.59.2.0/24256
116.59.4.0 – 116.59.4.255116.59.4.0/24256
116.59.6.0 – 116.59.6.255116.59.6.0/24256
116.59.8.0 – 116.59.31.255116.59.8.0/21, 116.59.16.0/206,144
116.59.48.0 – 116.59.255.255116.59.48.0/20, 116.59.64.0/18 …53,248
211.79.33.0 – 211.79.38.255211.79.33.0/24, 211.79.34.0/23 …1,536
211.79.40.0 – 211.79.42.255211.79.40.0/23, 211.79.42.0/24768
211.79.47.0 – 211.79.47.255211.79.47.0/24256
221.120.0.0 – 221.120.15.255221.120.0.0/204,096
221.120.19.0 – 221.120.21.255221.120.19.0/24, 221.120.20.0/23768
221.120.23.0 – 221.120.23.255221.120.23.0/24256
221.120.30.0 – 221.120.30.255221.120.30.0/24256
221.120.32.0 – 221.120.34.255221.120.32.0/23, 221.120.34.0/24768
221.120.36.0 – 221.120.38.255221.120.36.0/23, 221.120.38.0/24768
221.120.40.0 – 221.120.51.255221.120.40.0/21, 221.120.48.0/223,072
221.120.56.0 – 221.120.59.255221.120.56.0/221,024
221.120.72.0 – 221.120.83.255221.120.72.0/21, 221.120.80.0/223,072
223.136.0.0 – 223.141.255.255223.136.0.0/14, 223.140.0.0/15393,216
223.143.0.0 – 223.143.247.255223.143.0.0/17, 223.143.128.0/18 …63,488
2001:b400:: – 2001:b5ff:ffff:ffff:ffff:ffff:ffff:ffff2001:b400::/23IPv6
Showing 34 of 34 IPv4 and 1 of 1 IPv6 ranges All ranges (CSV)

IP Geolocation by DB-IP, ASN Lite, CC BY 4.0.

Using an address from this network? See which sources agree on where it is.

Sources

  1. DB-IP IP to ASN Lite (CC BY 4.0) · checked 3 Nov 2026
  2. NRO RIR delegated-extended statistics · checked 4 Nov 2026