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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,954 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.34.28.0/22 | 1k | APNIC |  CN | 22nd Aug 2014 |
| 103.34.32.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.36.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.4.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.40.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.44.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.48.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.52.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.56.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.60.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.64.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.68.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.72.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.76.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.8.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.80.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.84.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.88.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.92.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.34.96.0/22 | 1k | APNIC | CN | 22nd Aug 2014 |
| 103.35.0.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 103.35.100.0/22 | 1k | APNIC |  IN | 14th Aug 2015 |
| 103.35.12.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 103.35.154.0/23 | 512 | APNIC |  ID | 7th Nov 2022 |
| 103.35.16.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 103.35.188.0/22 | 1k | RIPE NCC |  MD | 24th Aug 2015 |
| 103.35.192.0/22 | 1k | APNIC | IN | 24th Aug 2015 |
| 103.35.196.0/22 | 1k | APNIC | IN | 24th Aug 2015 |
| 103.35.20.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 103.35.219.0/24 | 256 | APNIC | ID | 25th Aug 2022 |
| 103.35.220.0/22 | 1k | APNIC | CN | 25th Aug 2015 |
| 103.35.232.0/22 | 1k | APNIC | IN | 25th Aug 2015 |
| 103.35.236.0/22 | 1k | APNIC | ID | 25th Aug 2015 |
| 103.35.24.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 103.35.240.0/21 | 2k | APNIC | IN | 25th Aug 2015 |
| 103.35.28.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 103.35.32.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 103.35.36.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 103.35.4.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 103.35.40.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 103.35.44.0/22 | 1k | APNIC | CN | 26th Aug 2014 |
| 103.35.48.0/22 | 1k | APNIC | CN | 26th Aug 2014 |
| 103.35.60.0/22 | 1k | APNIC |  JP | 11th Aug 2015 |
| 103.35.8.0/22 | 1k | APNIC | CN | 23rd Aug 2014 |
| 103.35.91.0/24 | 256 | APNIC |  SG | 17th Aug 2015 |
| 103.36.128.0/24 | 256 | APNIC |  NZ | 15th Aug 2014 |
| 103.36.149.0/24 | 256 | APNIC | IN | 18th Aug 2014 |
| 103.36.160.0/22 | 1k | APNIC | CN | 17th Aug 2014 |
| 103.36.176.0/22 | 1k | APNIC | CN | 17th Aug 2014 |
| 103.36.180.0/22 | 1k | APNIC | CN | 17th Aug 2014 |