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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 unannounced space registered through APNIC, largest first.
Unannounced blocks registered through APNIC
22,591 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.155.172.0/23 | 512 | APNIC |  IN | 11th Sept 2020 |
| 103.155.214.0/23 | 512 | APNIC |  CN | 16th Sept 2020 |
| 103.155.220.0/24 | 256 | APNIC | IN | 17th Sept 2020 |
| 103.155.224.0/23 | 512 | APNIC |  ID | 17th Sept 2020 |
| 103.155.244.0/23 | 512 | APNIC |  HK | 18th Sept 2020 |
| 103.155.34.0/23 | 512 | APNIC | CN | 26th Aug 2020 |
| 103.155.48.0/23 | 512 | APNIC | CN | 31st Aug 2020 |
| 103.155.80.0/23 | 512 | APNIC |  VN | 3rd Sept 2020 |
| 103.155.82.0/23 | 512 | APNIC | VN | 3rd Sept 2020 |
| 103.156.104.0/23 | 512 | APNIC | CN | 23rd Sept 2020 |
| 103.156.106.0/23 | 512 | APNIC | IN | 23rd Sept 2020 |
| 103.156.116.0/23 | 512 | APNIC |  TW | 24th Sept 2020 |
| 103.156.158.0/23 | 512 | APNIC | CN | 28th Sept 2020 |
| 103.156.172.0/23 | 512 | APNIC | IN | 28th Sept 2020 |
| 103.156.182.0/23 | 512 | APNIC | IN | 29th Sept 2020 |
| 103.156.199.0/24 | 256 | APNIC |  AU | 30th Sept 2020 |
| 103.156.228.0/23 | 512 | APNIC | CN | 2nd Oct 2020 |
| 103.156.234.0/24 | 256 | APNIC | ID | 5th Oct 2020 |
| 103.156.252.0/23 | 512 | APNIC | ID | 7th Oct 2020 |
| 103.156.254.0/23 | 512 | APNIC | ID | 7th Oct 2020 |
| 103.156.28.0/23 | 512 | APNIC | CN | 21st Sept 2020 |
| 103.156.62.0/23 | 512 | APNIC | IN | 21st Sept 2020 |
| 103.156.94.0/23 | 512 | APNIC | IN | 23rd Sept 2020 |
| 103.157.112.0/23 | 512 | APNIC | IN | 19th Oct 2020 |
| 103.157.120.0/23 | 512 | APNIC |  SG | 19th Oct 2020 |
| 103.157.142.0/23 | 512 | APNIC |  JP | 20th Oct 2020 |
| 103.157.162.0/23 | 512 | APNIC | IN | 21st Oct 2020 |
| 103.157.164.0/23 | 512 | APNIC | IN | 21st Oct 2020 |
| 103.157.173.0/24 | 256 | APNIC |  KH | 23rd Oct 2020 |
| 103.157.174.0/23 | 512 | APNIC | CN | 22nd Oct 2020 |
| 103.157.18.0/23 | 512 | APNIC | VN | 8th Oct 2020 |
| 103.157.198.0/23 | 512 | APNIC |  MY | 23rd Oct 2020 |
| 103.157.208.0/23 | 512 | APNIC |  KR | 26th Oct 2020 |
| 103.157.212.0/23 | 512 | APNIC | CN | 27th Oct 2020 |
| 103.157.234.0/23 | 512 | APNIC | CN | 27th Oct 2020 |
| 103.157.254.0/23 | 512 | APNIC | CN | 30th Oct 2020 |
| 103.157.30.0/23 | 512 | APNIC | CN | 8th Oct 2020 |
| 103.157.36.0/23 | 512 | APNIC | IN | 9th Oct 2020 |
| 103.157.6.0/24 | 256 | APNIC | ID | 7th Oct 2020 |
| 103.157.70.0/23 | 512 | APNIC | IN | 14th Oct 2020 |
| 103.157.76.0/23 | 512 | APNIC | ID | 15th Oct 2020 |
| 103.157.86.0/23 | 512 | APNIC | TW | 15th Oct 2020 |
| 103.158.135.0/24 | 256 | APNIC |  PK | 29th Jun 2023 |
| 103.158.156.0/23 | 512 | APNIC | IN | 12th Nov 2020 |
| 103.158.16.0/23 | 512 | APNIC | CN | 2nd Nov 2020 |
| 103.158.164.0/23 | 512 | APNIC | ID | 13th Nov 2020 |
| 103.158.174.0/23 | 512 | APNIC | IN | 13th Nov 2020 |
| 103.158.178.0/23 | 512 | APNIC | IN | 16th Nov 2020 |
| 103.158.180.0/24 | 256 | APNIC | IN | 16th Nov 2020 |
| 103.158.188.0/23 | 512 | APNIC | ID | 17th Nov 2020 |