asn.dev

Address space

AS9924 TFN-TW Taiwan Fixed Network, Telco and Network Service Provider.

Residential APNIC NSP

IPv4 prefixes 464 1.51M addresses
IPv6 prefixes 75
Most common size /23 IPv4
Flagged 13

Shape

IPv4 prefix sizes

All IPv4
/15
/15: 1
1
/16
/16: 5
5
/17
/17: 4
4
/18
/18: 15
15
/19
/19: 25
25
/20
/20: 40
40
/21
/21: 64
64
/22
/22: 90
90
/23
/23: 111
111
/24
/24: 109
109

A wall of /24s usually means many small customer assignments or fine-grained traffic engineering; a few short prefixes means large contiguous allocations announced whole.

Shape

IPv6 prefix sizes

All IPv6
/28
/28: 1
1
/30
/30: 1
1
/31
/31: 2
2
/32
/32: 7
7
/33
/33: 3
3
/34
/34: 2
2
/35
/35: 5
5
/36
/36: 3
3
/37
/37: 3
3
/38
/38: 3
3
/39
/39: 3
3
/40
/40: 3
3
/41
/41: 3
3
/42
/42: 3
3
/43
/43: 3
3
/44
/44: 3
3
/45
/45: 3
3
/46
/46: 3
3
/47
/47: 2
2
/48
/48: 6
6
/49
/49: 1
1
/51
/51: 2
2
/52
/52: 2
2
/53
/53: 2
2
/54
/54: 2
2
/55
/55: 2
2
/56
/56: 2
2

Geography

Where the space lands

CountryNamePrefixes
TWTaiwan, Province of China539

Review

Flagged prefixes

13 of 539
PrefixFamilyAddressesCountryFlags
2001:4546:1000::/49IPv6/49TWToo specific
2001:4546:1000:8000::/53IPv6/53TWToo specific
2001:4546:1000:8800::/54IPv6/54TWToo specific
2001:4546:1000:8c00::/55IPv6/55TWToo specific
2001:4546:1000:8e00::/56IPv6/56TWToo specific
2001:4546:1000:9000::/52IPv6/52TWToo specific
2001:4546:1000:a000::/51IPv6/51TWToo specific
2001:4546:1000:c000::/52IPv6/52TWToo specific
2001:4546:1000:d000::/53IPv6/53TWToo specific
2001:4546:1000:d800::/55IPv6/55TWToo specific
2001:4546:1000:db00::/56IPv6/56TWToo specific
2001:4546:1000:dc00::/54IPv6/54TWToo specific
2001:4546:1000:e000::/51IPv6/51TWToo specific

A flag is an observation, not an accusation. Very large and very specific prefixes are both legitimate in the right context.