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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 in United States

26,972 blocks match, ordered by prefix.

Allocated but unannounced blocks, 23351 to 23400 of 26972
Prefix	Addresses	Registry	Country	Allocated
2607:65c0::/32	4.3B × /64	ARIN	US	29th Aug 2023
2607:6600::/32	4.3B × /64	ARIN	US	2nd Mar 2011
2607:6640::/32	4.3B × /64	ARIN	US	31st Aug 2023
2607:6700::/32	4.3B × /64	ARIN	US	8th May 2012
2607:6740::/32	4.3B × /64	ARIN	US	5th Sept 2023
2607:67c0::/32	4.3B × /64	ARIN	US	6th Sept 2023
2607:6840::/32	4.3B × /64	ARIN	US	7th Sept 2023
2607:6940::/32	4.3B × /64	ARIN	US	8th Sept 2023
2607:6a00::/32	4.3B × /64	ARIN	US	3rd Mar 2011
2607:6a80::/32	4.3B × /64	ARIN	US	7th Jul 2016
2607:6b00::/32	4.3B × /64	ARIN	US	10th May 2012
2607:6c0::/32	4.3B × /64	ARIN	US	14th Nov 2022
2607:6cc0::/32	4.3B × /64	ARIN	US	19th Sept 2023
2607:6d80::/32	4.3B × /64	ARIN	US	12th Jul 2016
2607:6dc0::/32	4.3B × /64	ARIN	US	25th Sept 2023
2607:6e00::/32	4.3B × /64	ARIN	US	3rd Mar 2011
2607:7080::/32	4.3B × /64	ARIN	US	14th Jul 2016
2607:7100::/32	4.3B × /64	ARIN	US	15th May 2012
2607:7280::/32	4.3B × /64	ARIN	US	19th Jul 2016
2607:7340::/32	4.3B × /64	ARIN	US	13th Oct 2023
2607:7380::/32	4.3B × /64	ARIN	US	10th Jun 2026
2607:7400::/32	4.3B × /64	ARIN	US	7th Oct 2010
2607:7440::/32	4.3B × /64	ARIN	US	16th Oct 2023
2607:7480::/32	4.3B × /64	ARIN	US	22nd Jul 2016
2607:7500::/32	4.3B × /64	ARIN	US	16th May 2012
2607:7580::/32	4.3B × /64	ARIN	US	25th Jul 2016
2607:7680::/32	4.3B × /64	ARIN	US	25th Jul 2016
2607:76c0::/36	268M × /64	ARIN	US	23rd Oct 2023
2607:7700::/32	4.3B × /64	ARIN	US	16th May 2012
2607:7740::/32	4.3B × /64	ARIN	US	23rd Oct 2023
2607:7800::/32	4.3B × /64	ARIN	US	7th Jun 2010
2607:78c0::/32	4.3B × /64	ARIN	US	2nd Nov 2023
2607:7900::/32	4.3B × /64	ARIN	US	17th May 2012
2607:7940::/32	4.3B × /64	ARIN	US	6th Nov 2023
2607:7980::/32	4.3B × /64	ARIN	US	28th Jul 2016
2607:79c0::/32	4.3B × /64	ARIN	US	6th Nov 2023
2607:7a00::/32	4.3B × /64	ARIN	US	4th Mar 2011
2607:7a80::/32	4.3B × /64	ARIN	US	28th Jul 2016
2607:7b40::/32	4.3B × /64	ARIN	US	13th Nov 2023
2607:7bc0::/32	4.3B × /64	ARIN	US	13th Nov 2023
2607:7c40::/32	4.3B × /64	ARIN	US	14th Nov 2023
2607:7d80::/32	4.3B × /64	ARIN	US	1st Aug 2016
2607:7dc0::/32	4.3B × /64	ARIN	US	16th Nov 2023
2607:7e40::/32	4.3B × /64	ARIN	US	20th Nov 2023
2607:7ec0::/32	4.3B × /64	ARIN	US	12th Jun 2026
2607:7f00::/32	4.3B × /64	ARIN	US	8th Oct 2012
2607:7f80::/32	4.3B × /64	ARIN	US	4th Aug 2016
2607:8000::/32	4.3B × /64	ARIN	US	18th Feb 2010
2607:8080::/32	4.3B × /64	ARIN	US	5th Aug 2016
2607:80::/32	4.3B × /64	ARIN	US	17th Feb 2016