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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,584 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 43.241.148.0/22 | 1k | APNIC |  ID | 19th May 2017 |
| 43.241.160.0/22 | 1k | APNIC |  TW | 25th Aug 2014 |
| 43.241.168.0/22 | 1k | APNIC |  CN | 25th Aug 2014 |
| 43.241.172.0/22 | 1k | APNIC | CN | 25th Aug 2014 |
| 43.241.176.0/22 | 1k | APNIC | CN | 25th Aug 2014 |
| 43.241.184.0/22 | 1k | APNIC | CN | 25th Aug 2014 |
| 43.241.196.0/24 | 256 | APNIC |  IN | 19th Oct 2026 |
| 43.241.198.0/23 | 512 | APNIC |  TH | 20th Oct 2026 |
| 43.241.20.0/22 | 1k | APNIC | CN | 19th Aug 2014 |
| 43.241.248.0/22 | 1k | APNIC | CN | 26th Aug 2014 |
| 43.241.32.0/22 | 1k | APNIC | TW | 19th Aug 2014 |
| 43.241.4.0/22 | 1k | APNIC | CN | 19th Aug 2014 |
| 43.241.8.0/22 | 1k | APNIC | CN | 19th Aug 2014 |
| 43.241.80.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 43.241.84.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 43.241.88.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 43.241.92.0/22 | 1k | APNIC | CN | 21st Aug 2014 |
| 43.242.12.0/22 | 1k | APNIC | CN | 27th Aug 2014 |
| 43.242.144.0/22 | 1k | APNIC | CN | 2nd Sept 2014 |
| 43.242.148.0/22 | 1k | APNIC | CN | 2nd Sept 2014 |
| 43.242.16.0/21 | 2k | APNIC | CN | 27th Aug 2014 |
| 43.242.160.0/22 | 1k | APNIC | CN | 2nd Sept 2014 |
| 43.242.168.0/22 | 1k | APNIC | CN | 3rd Sept 2014 |
| 43.242.204.0/22 | 1k | APNIC | CN | 4th Sept 2014 |
| 43.242.216.0/22 | 1k | APNIC | CN | 4th Sept 2014 |
| 43.242.220.0/22 | 1k | APNIC | CN | 4th Sept 2014 |
| 43.242.24.0/22 | 1k | APNIC | CN | 27th Aug 2014 |
| 43.242.28.0/22 | 1k | APNIC | CN | 28th Aug 2014 |
| 43.242.48.0/22 | 1k | APNIC | CN | 29th Aug 2014 |
| 43.242.56.0/22 | 1k | APNIC | CN | 29th Aug 2014 |
| 43.242.60.0/22 | 1k | APNIC | CN | 29th Aug 2014 |
| 43.242.64.0/22 | 1k | APNIC | CN | 29th Aug 2014 |
| 43.242.76.0/22 | 1k | APNIC | CN | 29th Aug 2014 |
| 43.242.8.0/22 | 1k | APNIC | CN | 27th Aug 2014 |
| 43.242.80.0/22 | 1k | APNIC | CN | 29th Aug 2014 |
| 43.242.88.0/22 | 1k | APNIC | CN | 29th Aug 2014 |
| 43.242.92.0/22 | 1k | APNIC | CN | 29th Aug 2014 |
| 43.243.108.0/22 | 1k | APNIC |  HK | 11th Sept 2014 |
| 43.243.124.0/22 | 1k | APNIC |  PH | 12th Sept 2014 |
| 43.243.144.0/22 | 1k | APNIC | CN | 12th Sept 2014 |
| 43.243.152.0/22 | 1k | APNIC | ID | 12th Sept 2014 |
| 43.243.160.0/22 | 1k | APNIC | HK | 12th Sept 2014 |
| 43.243.180.0/22 | 1k | APNIC | CN | 15th Sept 2014 |
| 43.243.196.0/22 | 1k | APNIC |  NZ | 16th Sept 2014 |
| 43.243.21.0/24 | 256 | APNIC | NZ | 9th Oct 2014 |
| 43.243.216.0/22 | 1k | APNIC |  KR | 16th Sept 2014 |
| 43.243.22.0/23 | 512 | APNIC | NZ | 15th Oct 2014 |
| 43.243.250.0/23 | 512 | APNIC | HK | 25th Oct 2026 |
| 43.243.52.0/22 | 1k | APNIC | HK | 9th Sept 2014 |
| 43.243.8.0/22 | 1k | APNIC | CN | 5th Sept 2014 |