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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
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Countries with the most unannounced blocks, largest first.
Unannounced blocks
84,783 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.16.84.0/22 | 1k | APNIC |  CN | 4th Feb 2013 |
| 103.16.88.0/22 | 1k | APNIC | CN | 4th Feb 2013 |
| 103.160.112.0/23 | 512 | APNIC | CN | 16th Dec 2020 |
| 103.160.114.0/23 | 512 | APNIC | CN | 16th Dec 2020 |
| 103.160.120.0/24 | 256 | APNIC |  IN | 16th Dec 2020 |
| 103.160.132.0/23 | 512 | APNIC | IN | 16th Dec 2020 |
| 103.160.136.0/24 | 256 | APNIC |  ID | 17th Dec 2020 |
| 103.160.158.0/24 | 256 | APNIC |  BD | 21st Dec 2020 |
| 103.160.18.0/23 | 512 | APNIC | ID | 10th Dec 2020 |
| 103.160.188.0/24 | 256 | APNIC | IN | 21st Dec 2020 |
| 103.160.189.0/24 | 256 | APNIC | IN | 21st Dec 2020 |
| 103.160.200.0/24 | 256 | APNIC | ID | 22nd Dec 2020 |
| 103.160.208.0/24 | 256 | APNIC | ID | 23rd Dec 2020 |
| 103.160.214.0/23 | 512 | APNIC |  TW | 23rd Dec 2020 |
| 103.160.218.0/23 | 512 | APNIC |  US | 24th Dec 2020 |
| 103.160.222.0/24 | 256 | APNIC | IN | 24th Dec 2020 |
| 103.160.224.0/23 | 512 | APNIC | TW | 25th Dec 2020 |
| 103.160.230.0/23 | 512 | APNIC | IN | 26th Dec 2020 |
| 103.160.238.0/23 | 512 | APNIC | IN | 26th Dec 2020 |
| 103.160.244.0/23 | 512 | APNIC | CN | 28th Dec 2020 |
| 103.160.246.0/24 | 256 | APNIC | ID | 28th Dec 2020 |
| 103.160.254.0/23 | 512 | APNIC | CN | 29th Dec 2020 |
| 103.160.30.0/23 | 512 | APNIC | IN | 10th Dec 2020 |
| 103.160.32.0/23 | 512 | APNIC | CN | 11th Dec 2020 |
| 103.160.34.0/23 | 512 | APNIC | CN | 11th Dec 2020 |
| 103.160.78.0/23 | 512 | APNIC |  VN | 15th Dec 2020 |
| 103.160.80.0/23 | 512 | APNIC | ID | 15th Dec 2020 |
| 103.160.88.0/23 | 512 | APNIC | VN | 15th Dec 2020 |
| 103.160.9.0/24 | 256 | APNIC | ID | 10th Dec 2020 |
| 103.160.90.0/23 | 512 | APNIC | VN | 15th Dec 2020 |
| 103.161.102.0/23 | 512 | APNIC | CN | 7th Jan 2021 |
| 103.161.134.0/23 | 512 | APNIC | ID | 8th Jan 2021 |
| 103.161.14.0/23 | 512 | APNIC | CN | 29th Dec 2020 |
| 103.161.160.0/24 | 256 | APNIC | ID | 12th Jan 2021 |
| 103.161.174.0/23 | 512 | APNIC | VN | 13th Jan 2021 |
| 103.161.176.0/23 | 512 | APNIC | VN | 13th Jan 2021 |
| 103.161.186.0/23 | 512 | APNIC | IN | 13th Jan 2021 |
| 103.161.204.0/23 | 512 | APNIC | IN | 14th Jan 2021 |
| 103.161.208.0/23 | 512 | APNIC | CN | 14th Jan 2021 |
| 103.161.229.0/24 | 256 | APNIC |  AU | 19th Jan 2021 |
| 103.161.238.0/23 | 512 | APNIC | ID | 19th Jan 2021 |
| 103.161.24.0/24 | 256 | APNIC | AU | 30th Dec 2020 |
| 103.161.36.0/23 | 512 | APNIC | VN | 20th Apr 2023 |
| 103.161.4.0/23 | 512 | APNIC |  KR | 29th Dec 2020 |
| 103.161.50.0/23 | 512 | APNIC | IN | 1st Jan 2021 |
| 103.161.76.0/24 | 256 | APNIC | ID | 5th Jan 2021 |
| 103.161.80.0/23 | 512 | APNIC | ID | 5th Jan 2021 |
| 103.161.82.0/23 | 512 | APNIC | IN | 5th Jan 2021 |
| 103.161.84.0/23 | 512 | APNIC | ID | 6th Jan 2021 |
| 103.161.88.0/23 | 512 | APNIC |  JP | 6th Jan 2021 |