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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 unannounced space registered through ARIN, largest first.

Unannounced blocks in United States

26,283 blocks match, ordered by prefix.

Allocated but unannounced blocks, 22851 to 22900 of 26283
Prefix	Addresses	Registry	Country	Allocated
2607:1440::/32	4.3B × /64	ARIN	US	15th Dec 2022
2607:1480::/32	4.3B × /64	ARIN	US	15th Mar 2016
2607:14c0::/32	4.3B × /64	ARIN	US	16th Dec 2022
2607:1500::/32	4.3B × /64	ARIN	US	2nd Mar 2012
2607:1540::/32	4.3B × /64	ARIN	US	4th Jun 2026
2607:1600::/32	4.3B × /64	ARIN	US	22nd Feb 2011
2607:16c0::/32	4.3B × /64	ARIN	US	22nd Dec 2022
2607:1780::/32	4.3B × /64	ARIN	US	16th Mar 2016
2607:17c0::/32	4.3B × /64	ARIN	US	22nd Dec 2022
2607:1840::/32	4.3B × /64	ARIN	US	22nd Dec 2022
2607:1980::/32	4.3B × /64	ARIN	US	16th Mar 2016
2607:1a80::/32	4.3B × /64	ARIN	US	17th Mar 2016
2607:1b80::/32	4.3B × /64	ARIN	US	18th Mar 2016
2607:1bc0::/32	4.3B × /64	ARIN	US	10th Jan 2023
2607:1c40::/32	4.3B × /64	ARIN	US	11th Jan 2023
2607:1dc0::/32	4.3B × /64	ARIN	US	11th Jan 2023
2607:1ec0::/32	4.3B × /64	ARIN	US	13th Jan 2023
2607:1f80::/32	4.3B × /64	ARIN	US	25th Mar 2016
2607:200::/32	4.3B × /64	ARIN	US	18th Feb 2011
2607:2140::/32	4.3B × /64	ARIN	US	20th Jan 2023
2607:21c0::/32	4.3B × /64	ARIN	US	25th Jan 2023
2607:2200::/32	4.3B × /64	ARIN	US	23rd Feb 2011
2607:22c0::/32	4.3B × /64	ARIN	US	27th Jan 2023
2607:2300::/32	4.3B × /64	ARIN	US	14th Mar 2012
2607:2440::/32	4.3B × /64	ARIN	US	2nd Feb 2023
2607:2480::/32	4.3B × /64	ARIN	US	28th Mar 2016
2607:25c0::/32	4.3B × /64	ARIN	US	3rd Feb 2023
2607:26c0::/32	4.3B × /64	ARIN	US	6th Feb 2023
2607:27c0::/32	4.3B × /64	ARIN	US	9th Feb 2023
2607:2840::/32	4.3B × /64	ARIN	US	9th Feb 2023
2607:28c0::/32	4.3B × /64	ARIN	US	10th Feb 2023
2607:2940::/32	4.3B × /64	ARIN	US	10th Feb 2023
2607:2980::/32	4.3B × /64	ARIN	US	5th Apr 2016
2607:2b00::/32	4.3B × /64	ARIN	US	16th Mar 2012
2607:2c80::/32	4.3B × /64	ARIN	US	5th Jun 2026
2607:2d80::/32	4.3B × /64	ARIN	US	7th Apr 2016
2607:2dc0::/32	4.3B × /64	ARIN	US	22nd Feb 2023
2607:2f40::/32	4.3B × /64	ARIN	US	27th Feb 2023
2607:2fc0::/32	4.3B × /64	ARIN	US	27th Feb 2023
2607:3000::/32	4.3B × /64	ARIN	US	5th Apr 2010
2607:3040::/32	4.3B × /64	ARIN	US	1st Mar 2023
2607:3080::/32	4.3B × /64	ARIN	US	13th Apr 2016
2607:30c0::/32	4.3B × /64	ARIN	US	2nd Mar 2023
2607:3100::/32	4.3B × /64	ARIN	US	21st Mar 2012
2607:3140::/32	4.3B × /64	ARIN	US	2nd Mar 2023
2607:31c0::/32	4.3B × /64	ARIN	US	2nd Mar 2023
2607:32c0::/32	4.3B × /64	ARIN	US	7th Mar 2023
2607:3300::/32	4.3B × /64	ARIN	US	22nd Mar 2012
2607:3340::/32	4.3B × /64	ARIN	US	7th Mar 2023
2607:3480::/32	4.3B × /64	ARIN	US	20th Apr 2016