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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 103.167.230.0/23 | 512 | APNIC |  KR | 4th Jun 2021 |
| 103.167.32.0/23 | 512 | APNIC |  IN | 11th May 2021 |
| 103.167.36.0/23 | 512 | APNIC |  CN | 12th May 2021 |
| 103.167.42.0/23 | 512 | APNIC |  JP | 13th May 2021 |
| 103.167.76.0/24 | 256 | APNIC | IN | 18th May 2021 |
| 103.167.78.0/23 | 512 | APNIC |  NP | 18th May 2021 |
| 103.167.86.0/23 | 512 | APNIC |  VN | 19th May 2021 |
| 103.168.153.0/24 | 256 | APNIC |  ID | 17th Jun 2021 |
| 103.168.170.0/23 | 512 | APNIC | CN | 21st Jun 2021 |
| 103.168.193.0/24 | 256 | APNIC |  AF | 22nd Jun 2021 |
| 103.168.194.0/23 | 512 | APNIC | IN | 21st Jun 2021 |
| 103.168.219.0/24 | 256 | APNIC | IN | 24th Jun 2021 |
| 103.168.226.0/23 | 512 | APNIC | IN | 23rd Jun 2021 |
| 103.168.234.0/23 | 512 | APNIC | IN | 24th Jun 2021 |
| 103.168.236.0/23 | 512 | APNIC | IN | 24th Jun 2021 |
| 103.168.24.0/23 | 512 | APNIC | ID | 9th Jun 2021 |
| 103.168.242.0/23 | 512 | APNIC | IN | 24th Jun 2021 |
| 103.168.244.0/24 | 256 | APNIC | IN | 24th Jun 2021 |
| 103.168.74.0/24 | 256 | APNIC | IN | 14th Jun 2021 |
| 103.168.76.0/23 | 512 | APNIC | IN | 14th Jun 2021 |
| 103.168.78.0/23 | 512 | APNIC | IN | 15th Jun 2021 |
| 103.168.98.0/23 | 512 | APNIC | CN | 16th Jun 2021 |
| 103.169.0.0/23 | 512 | APNIC | ID | 24th Jun 2021 |
| 103.169.106.0/23 | 512 | APNIC |  TW | 2nd Jul 2021 |
| 103.169.108.0/23 | 512 | APNIC | CN | 2nd Jul 2021 |
| 103.169.136.0/23 | 512 | APNIC | ID | 2nd Jul 2021 |
| 103.169.143.0/24 | 256 | APNIC | ID | 12th Sept 2023 |
| 103.169.152.0/23 | 512 | APNIC | IN | 6th Jul 2021 |
| 103.169.162.0/23 | 512 | APNIC | CN | 7th Jul 2021 |
| 103.169.167.0/24 | 256 | APNIC | IN | 7th Jul 2021 |
| 103.169.199.0/24 | 256 | APNIC | ID | 9th Jul 2021 |
| 103.169.202.0/23 | 512 | APNIC | CN | 13th Jul 2021 |
| 103.169.204.0/23 | 512 | APNIC | ID | 14th Jul 2021 |
| 103.169.34.0/23 | 512 | APNIC | VN | 25th Jun 2021 |
| 103.169.48.0/23 | 512 | APNIC | ID | 28th Jun 2021 |
| 103.169.58.0/23 | 512 | APNIC | IN | 28th Jun 2021 |
| 103.169.74.0/23 | 512 | APNIC | IN | 30th Jun 2021 |
| 103.169.8.0/23 | 512 | APNIC | ID | 25th Jun 2021 |
| 103.17.120.0/22 | 1k | APNIC | CN | 28th Feb 2013 |
| 103.17.136.0/22 | 1k | APNIC | CN | 2nd Nov 2015 |
| 103.17.14.0/23 | 512 | APNIC | IN | 25th Apr 2023 |
| 103.17.160.0/22 | 1k | APNIC | CN | 4th Mar 2013 |
| 103.17.166.0/23 | 512 | APNIC | AF | 4th Mar 2013 |
| 103.17.168.0/22 | 1k | APNIC |  MY | 4th Mar 2013 |
| 103.17.188.0/22 | 1k | APNIC | JP | 5th Mar 2013 |
| 103.17.196.0/22 | 1k | APNIC |  HK | 5th Mar 2013 |
| 103.17.200.0/24 | 256 | APNIC |  PK | 6th Mar 2013 |
| 103.17.204.0/22 | 1k | APNIC | CN | 6th Mar 2013 |
| 103.17.216.0/22 | 1k | APNIC |  AU | 6th Mar 2013 |
| 103.17.59.0/24 | 256 | APNIC | AU | 26th Feb 2013 |