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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
Browse by country
Countries with the most unannounced blocks, largest first.
Unannounced blocks
85,221 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2804:9a0c::/32 | 4.3B × /64 | LACNIC |  BR | 7th Aug 2026 |
| 2804:9a10::/32 | 4.3B × /64 | LACNIC | BR | 10th Aug 2026 |
| 2804:9a14::/32 | 4.3B × /64 | LACNIC | BR | 11th Aug 2026 |
| 2804:9a18::/32 | 4.3B × /64 | LACNIC | BR | 12th Aug 2026 |
| 2804:9a1c::/32 | 4.3B × /64 | LACNIC | BR | 12th Aug 2026 |
| 2804:9a20::/32 | 4.3B × /64 | LACNIC | BR | 13th Aug 2026 |
| 2804:9a24::/32 | 4.3B × /64 | LACNIC | BR | 17th Aug 2026 |
| 2804:9a28::/32 | 4.3B × /64 | LACNIC | BR | 18th Aug 2026 |
| 2804:9a2c::/32 | 4.3B × /64 | LACNIC | BR | 19th Aug 2026 |
| 2804:9a30::/32 | 4.3B × /64 | LACNIC | BR | 19th Aug 2026 |
| 2804:9a34::/32 | 4.3B × /64 | LACNIC | BR | 19th Aug 2026 |
| 2804:9a38::/32 | 4.3B × /64 | LACNIC | BR | 20th Aug 2026 |
| 2804:9a3c::/32 | 4.3B × /64 | LACNIC | BR | 20th Aug 2026 |
| 2804:9a40::/32 | 4.3B × /64 | LACNIC | BR | 24th Aug 2026 |
| 2804:9a44::/32 | 4.3B × /64 | LACNIC | BR | 24th Aug 2026 |
| 2804:9a48::/32 | 4.3B × /64 | LACNIC | BR | 24th Aug 2026 |
| 2804:9a4c::/32 | 4.3B × /64 | LACNIC | BR | 25th Aug 2026 |
| 2804:9a50::/32 | 4.3B × /64 | LACNIC | BR | 25th Aug 2026 |
| 2804:9a54::/32 | 4.3B × /64 | LACNIC | BR | 28th Aug 2026 |
| 2804:9a58::/32 | 4.3B × /64 | LACNIC | BR | 31st Aug 2026 |
| 2804:9a5c::/32 | 4.3B × /64 | LACNIC | BR | 1st Sept 2026 |
| 2804:9a60::/32 | 4.3B × /64 | LACNIC | BR | 1st Sept 2026 |
| 2804:9a64::/32 | 4.3B × /64 | LACNIC | BR | 2nd Sept 2026 |
| 2804:9a68::/32 | 4.3B × /64 | LACNIC | BR | 2nd Sept 2026 |
| 2804:9a6c::/32 | 4.3B × /64 | LACNIC | BR | 2nd Sept 2026 |
| 2804:9a70::/32 | 4.3B × /64 | LACNIC | BR | 2nd Sept 2026 |
| 2804:9b0::/32 | 4.3B × /64 | LACNIC | BR | 7th May 2012 |
| 2804:9b8::/32 | 4.3B × /64 | LACNIC | BR | 10th May 2012 |
| 2804:9cc::/32 | 4.3B × /64 | LACNIC | BR | 15th May 2012 |
| 2804:9e8::/32 | 4.3B × /64 | LACNIC | BR | 18th May 2012 |
| 2804:9fc::/32 | 4.3B × /64 | LACNIC | BR | 22nd May 2012 |
| 2804:a08::/32 | 4.3B × /64 | LACNIC | BR | 29th May 2012 |
| 2804:a34::/32 | 4.3B × /64 | LACNIC | BR | 6th Jun 2012 |
| 2804:a3c::/32 | 4.3B × /64 | LACNIC | BR | 11th Jun 2012 |
| 2804:a5c::/32 | 4.3B × /64 | LACNIC | BR | 26th Jun 2012 |
| 2804:a68::/32 | 4.3B × /64 | LACNIC | BR | 3rd Jul 2012 |
| 2804:a70::/32 | 4.3B × /64 | LACNIC | BR | 3rd Jul 2012 |
| 2804:a88::/32 | 4.3B × /64 | LACNIC | BR | 16th Jul 2012 |
| 2804:a90::/32 | 4.3B × /64 | LACNIC | BR | 17th Jul 2012 |
| 2804:aa0::/32 | 4.3B × /64 | LACNIC | BR | 19th Jul 2012 |
| 2804:b60::/32 | 4.3B × /64 | LACNIC | BR | 10th Sept 2012 |
| 2804:b78::/32 | 4.3B × /64 | LACNIC | BR | 17th Sept 2012 |
| 2804:b80::/32 | 4.3B × /64 | LACNIC | BR | 21st Sept 2012 |
| 2804:b88::/32 | 4.3B × /64 | LACNIC | BR | 27th Sept 2012 |
| 2804:b9c::/32 | 4.3B × /64 | LACNIC | BR | 1st Oct 2012 |
| 2804:ba4::/31 | 8.6B × /64 | LACNIC | BR | 3rd Oct 2012 |
| 2804:bb0::/32 | 4.3B × /64 | LACNIC | BR | 8th Oct 2012 |
| 2804:bbc::/32 | 4.3B × /64 | LACNIC | BR | 10th Oct 2012 |
| 2804:be0::/32 | 4.3B × /64 | LACNIC | BR | 25th Oct 2012 |
| 2804:c10::/32 | 4.3B × /64 | LACNIC | BR | 23rd Nov 2012 |