Allocated but unannounced space
Every block here was allocated or assigned by a regional internet registry, and none of them appeared in any routing table we collected at our last snapshot — neither as a route of their own, nor covered by a larger announcement, nor carved up into more specifics.
“Unannounced” does not mean “unused”
Plenty of allocated space is deliberately kept off the public internet: private interconnects, lab and lawful-intercept ranges, networks reachable only inside one operator, and space held in reserve. Some of it is announced somewhere our collectors cannot see, which is a limit of our vantage points rather than a fact about the block.
It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today. Nothing on this page means a block is unallocated, available, or free to announce.
Browse by registry
Browse by country
Countries with the most unannounced blocks, largest first.
Unannounced blocks
84,954 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.229.12.0/23 | 512 | APNIC |  ID | 4th Apr 2014 |
| 103.229.136.0/22 | 1k | APNIC |  CN | 16th Apr 2014 |
| 103.229.140.0/22 | 1k | APNIC |  HK | 16th Apr 2014 |
| 103.229.144.0/22 | 1k | APNIC | HK | 16th Apr 2014 |
| 103.229.170.0/23 | 512 | RIPE NCC |  ES | 16th Apr 2014 |
| 103.229.186.0/24 | 256 | APNIC |  SG | 22nd Apr 2014 |
| 103.229.20.0/22 | 1k | APNIC | CN | 4th Apr 2014 |
| 103.229.208.0/22 | 1k | APNIC |  IN | 22nd Apr 2014 |
| 103.229.224.0/22 | 1k | APNIC | HK | 23rd Apr 2014 |
| 103.229.228.0/22 | 1k | APNIC | CN | 23rd Apr 2014 |
| 103.229.240.0/22 | 1k | APNIC | CN | 23rd Apr 2014 |
| 103.229.76.0/23 | 512 | APNIC | ID | 8th Apr 2014 |
| 103.229.90.0/23 | 512 | APNIC | IN | 26th Jun 2023 |
| 103.23.108.0/23 | 512 | APNIC |  TW | 22nd Nov 2011 |
| 103.23.110.0/23 | 512 | APNIC | TW | 22nd Nov 2011 |
| 103.23.112.0/22 | 1k | APNIC |  US | 22nd Nov 2011 |
| 103.23.140.0/24 | 256 | APNIC | IN | 28th Nov 2011 |
| 103.23.151.0/24 | 256 | APNIC | ID | 2nd Dec 2011 |
| 103.23.164.0/22 | 1k | APNIC | CN | 30th Nov 2011 |
| 103.23.176.0/22 | 1k | APNIC | CN | 1st Dec 2011 |
| 103.23.180.0/22 | 1k | APNIC | ID | 2nd Dec 2011 |
| 103.23.192.0/22 | 1k | APNIC | HK | 5th Dec 2011 |
| 103.23.228.0/22 | 1k | APNIC | CN | 8th Dec 2011 |
| 103.23.44.0/24 | 256 | APNIC |  MY | 15th Nov 2011 |
| 103.23.56.0/22 | 1k | APNIC | CN | 16th Nov 2011 |
| 103.23.76.0/22 | 1k | APNIC | SG | 16th Jan 2012 |
| 103.23.90.0/23 | 512 | APNIC |  VN | 25th Aug 2023 |
| 103.23.96.0/23 | 512 | APNIC | ID | 21st Oct 2022 |
| 103.230.0.0/22 | 1k | APNIC | CN | 24th Apr 2014 |
| 103.230.112.0/22 | 1k | APNIC |  KR | 30th Apr 2014 |
| 103.230.116.0/22 | 1k | APNIC |  PH | 29th Jun 2016 |
| 103.230.160.0/22 | 1k | APNIC | HK | 1st May 2014 |
| 103.230.196.0/22 | 1k | APNIC | CN | 4th May 2014 |
| 103.230.204.0/22 | 1k | APNIC | CN | 4th May 2014 |
| 103.230.228.0/22 | 1k | APNIC | HK | 6th May 2014 |
| 103.230.247.0/24 | 256 | APNIC | IN | 4th Jul 2023 |
| 103.230.28.0/22 | 1k | APNIC | CN | 24th Apr 2014 |
| 103.230.44.0/22 | 1k | APNIC | CN | 24th Apr 2014 |
| 103.230.52.0/22 | 1k | APNIC | IN | 25th Apr 2014 |
| 103.230.72.0/22 | 1k | APNIC |  AU | 29th Apr 2014 |
| 103.230.83.0/24 | 256 | APNIC | ID | 2nd May 2014 |
| 103.230.96.0/22 | 1k | APNIC | CN | 29th Apr 2014 |
| 103.231.108.0/22 | 1k | APNIC | ID | 12th May 2014 |
| 103.231.122.0/24 | 256 | APNIC | ID | 13th May 2014 |
| 103.231.128.0/22 | 1k | APNIC | KR | 13th May 2014 |
| 103.231.132.0/23 | 512 | APNIC | IN | 13th May 2014 |
| 103.231.148.0/22 | 1k | APNIC | VN | 14th May 2014 |
| 103.231.156.0/23 | 512 | APNIC |  NZ | 14th May 2014 |
| 103.231.170.0/24 | 256 | APNIC | ID | 16th May 2014 |
| 103.231.180.0/22 | 1k | APNIC | CN | 15th May 2014 |