asn.dev

Address space

AS152194 CTGSERVERLIMITED-AS-AP CTG Server Limited

Unclassified Spamhaus ASN-DROP APNIC

IPv4 prefixes 242 188K addresses
IPv6 prefixes 2
Most common size /24 IPv4
Flagged 16

Shape

IPv4 prefix sizes

All IPv4
/19
/19: 1
1
/20
/20: 11
11
/21
/21: 20
20
/22
/22: 36
36
/23
/23: 64
64
/24
/24: 94
94
/25
/25: 2
2
/26
/26: 2
2
/27
/27: 2
2
/28
/28: 2
2
/29
/29: 2
2
/30
/30: 2
2
/31
/31: 2
2
/32
/32: 2
2

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
/32
/32: 2
2

Geography

Where the space lands

CountryNamePrefixes
HKHong Kong244

Review

Flagged prefixes

16 of 244
PrefixFamilyAddressesCountryFlags
27.124.46.0/27IPv432HKToo specific
27.124.46.32/29IPv48HKToo specific
27.124.46.40/30IPv44HKToo specific
27.124.46.44/31IPv42HKToo specific
27.124.46.47/32IPv41HKToo specific
27.124.46.48/28IPv416HKToo specific
27.124.46.64/26IPv464HKToo specific
27.124.46.128/25IPv4128HKToo specific
137.220.191.0/29IPv48HKToo specific
137.220.191.8/31IPv42HKToo specific
137.220.191.10/32IPv41HKToo specific
137.220.191.12/30IPv44HKToo specific
137.220.191.16/28IPv416HKToo specific
137.220.191.32/27IPv432HKToo specific
137.220.191.64/26IPv464HKToo specific
137.220.191.128/25IPv4128HKToo specific

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