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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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.
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Countries with the most unannounced blocks, largest first.
Unannounced blocks
84,960 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.96.168.0/22 | 1k | APNIC |  CN | 8th Jul 2017 |
| 103.96.172.0/22 | 1k | APNIC | CN | 8th Jul 2017 |
| 103.96.176.0/22 | 1k | APNIC | CN | 8th Jul 2017 |
| 103.96.180.0/22 | 1k | APNIC | CN | 8th Jul 2017 |
| 103.96.184.0/22 | 1k | APNIC | CN | 8th Jul 2017 |
| 103.96.188.0/22 | 1k | APNIC | CN | 8th Jul 2017 |
| 103.96.192.0/22 | 1k | APNIC | CN | 9th Jul 2017 |
| 103.96.196.0/22 | 1k | APNIC | CN | 9th Jul 2017 |
| 103.96.200.0/22 | 1k | APNIC | CN | 9th Jul 2017 |
| 103.96.204.0/22 | 1k | APNIC | CN | 9th Jul 2017 |
| 103.96.208.0/22 | 1k | APNIC | CN | 9th Jul 2017 |
| 103.96.216.0/22 | 1k | APNIC | CN | 10th Jul 2017 |
| 103.96.52.0/23 | 512 | APNIC |  ID | 23rd Feb 2023 |
| 103.96.56.0/22 | 1k | APNIC |  AU | 3rd Jul 2017 |
| 103.97.103.0/24 | 256 | APNIC |  IN | 18th Jul 2017 |
| 103.97.116.0/22 | 1k | APNIC | CN | 19th Jul 2017 |
| 103.97.12.0/22 | 1k | APNIC | CN | 12th Jul 2017 |
| 103.97.136.0/22 | 1k | APNIC | IN | 19th Jul 2017 |
| 103.97.148.0/22 | 1k | APNIC | CN | 20th Jul 2017 |
| 103.97.153.0/24 | 256 | APNIC | ID | 21st Nov 2022 |
| 103.97.16.0/20 | 4.1k | APNIC | CN | 12th Jul 2017 |
| 103.97.188.0/22 | 1k | APNIC | CN | 21st Jul 2017 |
| 103.97.192.0/22 | 1k | APNIC | CN | 21st Jul 2017 |
| 103.97.217.0/24 | 256 | APNIC | AU | 26th Jul 2017 |
| 103.97.231.0/24 | 256 | APNIC | ID | 21st Nov 2022 |
| 103.97.250.0/24 | 256 | APNIC | AU | 21st Jun 2023 |
| 103.97.36.0/22 | 1k | APNIC | CN | 13th Jul 2017 |
| 103.97.40.0/22 | 1k | APNIC | CN | 14th Jul 2017 |
| 103.97.56.0/22 | 1k | APNIC | CN | 14th Jul 2017 |
| 103.97.64.0/22 | 1k | APNIC | CN | 14th Jul 2017 |
| 103.97.68.0/22 | 1k | APNIC | CN | 14th Jul 2017 |
| 103.97.72.0/22 | 1k | APNIC | CN | 14th Jul 2017 |
| 103.97.8.0/22 | 1k | APNIC | CN | 12th Jul 2017 |
| 103.98.0.0/23 | 512 | APNIC | CN | 27th Feb 2023 |
| 103.98.100.0/22 | 1k | APNIC | CN | 3rd Aug 2017 |
| 103.98.136.0/22 | 1k | APNIC | CN | 8th Aug 2017 |
| 103.98.140.0/22 | 1k | APNIC | CN | 8th Aug 2017 |
| 103.98.144.0/22 | 1k | APNIC | CN | 8th Aug 2017 |
| 103.98.164.0/22 | 1k | APNIC | CN | 8th Aug 2017 |
| 103.98.168.0/22 | 1k | APNIC | CN | 9th Aug 2017 |
| 103.98.180.0/22 | 1k | APNIC | CN | 10th Aug 2017 |
| 103.98.196.0/22 | 1k | APNIC | CN | 11th Aug 2017 |
| 103.98.216.0/22 | 1k | APNIC | CN | 11th Aug 2017 |
| 103.98.224.0/22 | 1k | APNIC | CN | 11th Aug 2017 |
| 103.98.228.0/22 | 1k | APNIC | CN | 11th Aug 2017 |
| 103.98.232.0/22 | 1k | APNIC | CN | 14th Aug 2017 |
| 103.98.240.0/22 | 1k | APNIC | CN | 17th Aug 2017 |
| 103.98.244.0/22 | 1k | APNIC | CN | 17th Aug 2017 |
| 103.98.40.0/22 | 1k | APNIC | CN | 1st Aug 2017 |
| 103.98.48.0/22 | 1k | APNIC | CN | 1st Aug 2017 |