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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

27,001 blocks match, ordered by prefix.

Allocated but unannounced blocks, 22501 to 22550 of 27001
Prefix	Addresses	Registry	Country	Allocated
2605:1580::/32	4.3B × /64	ARIN	US	25th Oct 2013
2605:160::/32	4.3B × /64	ARIN	US	20th Jul 2026
2605:1780::/32	4.3B × /64	ARIN	US	29th Oct 2013
2605:17c0::/32	4.3B × /64	ARIN	US	8th Jan 2019
2605:1840::/32	4.3B × /64	ARIN	US	15th Jan 2019
2605:19c0::/32	4.3B × /64	ARIN	US	22nd Jan 2019
2605:1a00::/32	4.3B × /64	ARIN	US	13th Dec 2010
2605:1a40::/32	4.3B × /64	ARIN	US	23rd Jan 2019
2605:1a80::/32	4.3B × /64	ARIN	US	6th Nov 2013
2605:1ac0::/32	4.3B × /64	ARIN	US	23rd Jan 2019
2605:1b80::/32	4.3B × /64	ARIN	US	6th Nov 2013
2605:1c0::/32	4.3B × /64	ARIN	US	16th Jul 2026
2605:1c40::/32	4.3B × /64	ARIN	US	20th Feb 2026
2605:1d00::/32	4.3B × /64	ARIN	US	8th Jun 2011
2605:1d40::/32	4.3B × /64	ARIN	US	30th Jan 2019
2605:1dc0::/32	4.3B × /64	ARIN	US	1st Feb 2019
2605:1e00::/32	4.3B × /64	ARIN	US	14th Dec 2010
2605:1e40::/32	4.3B × /64	ARIN	US	1st Feb 2019
2605:1f40::/32	4.3B × /64	ARIN	US	5th Feb 2019
2605:1f80::/32	4.3B × /64	ARIN	US	14th Nov 2013
2605:1fc0::/32	4.3B × /64	ARIN	US	8th Feb 2019
2605:2000::/32	4.3B × /64	ARIN	US	3rd Mar 2010
2605:2040::/32	4.3B × /64	ARIN	US	8th Feb 2019
2605:20c0::/32	4.3B × /64	ARIN	US	8th Feb 2019
2605:2180::/32	4.3B × /64	ARIN	US	19th Nov 2013
2605:2200::/32	4.3B × /64	ARIN	US	15th Dec 2010
2605:2240::/32	4.3B × /64	ARIN	US	13th Feb 2019
2605:22c0::/32	4.3B × /64	ARIN	US	21st Feb 2019
2605:2300::/32	4.3B × /64	ARIN	US	9th Jun 2011
2605:2340::/32	4.3B × /64	ARIN	US	26th Feb 2019
2605:2380::/32	4.3B × /64	ARIN	US	20th Nov 2013
2605:23c0::/32	4.3B × /64	ARIN	US	24th Feb 2026
2605:2440::/32	4.3B × /64	ARIN	US	27th Feb 2019
2605:2500::/32	4.3B × /64	ARIN	US	10th Jun 2011
2605:2580::/32	4.3B × /64	ARIN	US	25th Nov 2013
2605:25c0::/32	4.3B × /64	ARIN	US	1st Mar 2019
2605:2740::/32	4.3B × /64	ARIN	US	5th Mar 2019
2605:2780::/32	4.3B × /64	ARIN	US	25th Feb 2026
2605:28c0::/32	4.3B × /64	ARIN	US	12th Mar 2019
2605:2980::/32	4.3B × /64	ARIN	US	3rd Dec 2013
2605:2c00::/32	4.3B × /64	ARIN	US	27th Jul 2010
2605:2c80::/32	4.3B × /64	ARIN	US	6th Dec 2013
2605:2d40::/32	4.3B × /64	ARIN	US	18th Mar 2019
2605:2ec0::/32	4.3B × /64	ARIN	US	22nd Mar 2019
2605:2f00::/32	4.3B × /64	ARIN	US	13th Jun 2011
2605:2f40::/32	4.3B × /64	ARIN	US	25th Mar 2019
2605:2f80::/32	4.3B × /64	ARIN	US	27th Feb 2026
2605:2fc0::/32	4.3B × /64	ARIN	US	27th Mar 2019
2605:3080::/32	4.3B × /64	ARIN	US	19th Dec 2013
2605:30c0::/32	4.3B × /64	ARIN	US	29th Mar 2019