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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

30,441 blocks match, ordered by prefix.

Allocated but unannounced blocks, 26001 to 26050 of 30441
Prefix	Addresses	Registry	Country	Allocated
2605:5540::/32	4.3B × /64	ARIN	US	17th Jul 2019
2605:55c0::/32	4.3B × /64	ARIN	US	17th Jul 2019
2605:5600::/32	4.3B × /64	ARIN	US	3rd Jan 2011
2605:5680::/32	4.3B × /64	ARIN	US	13th Mar 2014
2605:5700::/32	4.3B × /64	ARIN	US	29th Jun 2011
2605:5740::/36	268M × /64	ARIN	US	22nd Jul 2019
2605:5780::/32	4.3B × /64	ARIN	US	12th Mar 2026
2605:57c0::/32	4.3B × /64	ARIN	US	23rd Jul 2019
2605:5900::/32	4.3B × /64	ARIN	JM	30th Jun 2011
2605:5a00::/32	4.3B × /64	ARIN	US	3rd Jan 2011
2605:5a40::/32	4.3B × /64	ARIN	US	29th Jul 2019
2605:5a80::/32	4.3B × /64	ARIN	US	20th Mar 2014
2605:5ac0::/32	4.3B × /64	ARIN	CA	29th Jul 2019
2605:5b80::/32	4.3B × /64	ARIN	BM	16th Mar 2026
2605:5bc0::/32	4.3B × /64	ARIN	US	30th Jul 2019
2605:5c00::/32	4.3B × /64	ARIN	US	4th Aug 2010
2605:5c40::/32	4.3B × /64	ARIN	US	30th Jul 2019
2605:5c80::/32	4.3B × /64	ARIN	US	16th Mar 2026
2605:5cc0::/32	4.3B × /64	ARIN	US	31st Jul 2019
2605:5d40::/32	4.3B × /64	ARIN	PR	5th Aug 2019
2605:5d80::/32	4.3B × /64	ARIN	US	2nd Apr 2014
2605:5dc0::/32	4.3B × /64	ARIN	US	5th Aug 2019
2605:5e40::/32	4.3B × /64	ARIN	US	8th Aug 2019
2605:5ec0::/32	4.3B × /64	ARIN	US	8th Aug 2019
2605:5f00::/32	4.3B × /64	ARIN	US	1st Jul 2011
2605:5f40::/32	4.3B × /64	ARIN	CA	13th Aug 2019
2605:600::/32	4.3B × /64	ARIN	US	7th Dec 2010
2605:6040::/32	4.3B × /64	ARIN	US	20th Aug 2019
2605:6100::/32	4.3B × /64	ARIN	US	1st Jul 2011
2605:6240::/32	4.3B × /64	ARIN	US	27th Aug 2019
2605:6380::/32	4.3B × /64	ARIN	US	24th Apr 2014
2605:63c0::/32	4.3B × /64	ARIN	US	3rd Sept 2019
2605:640::/32	4.3B × /64	ARIN	US	31st Oct 2018
2605:6540::/32	4.3B × /64	ARIN	US	10th Sept 2019
2605:6580::/32	4.3B × /64	ARIN	US	25th Apr 2014
2605:6680::/32	4.3B × /64	ARIN	US	5th May 2014
2605:6700::/32	4.3B × /64	ARIN	US	11th Jul 2011
2605:6780::/32	4.3B × /64	ARIN	US	6th May 2014
2605:67c0::/32	4.3B × /64	ARIN	US	20th Sept 2019
2605:680::/32	4.3B × /64	ARIN	US	24th Sept 2013
2605:68c0::/32	4.3B × /64	ARIN	US	20th Sept 2019
2605:6940::/32	4.3B × /64	ARIN	US	20th Sept 2019
2605:69c0::/32	4.3B × /64	ARIN	US	24th Sept 2019
2605:6a00::/32	4.3B × /64	ARIN	CA	4th Jan 2011
2605:6a80::/32	4.3B × /64	ARIN	US	12th May 2014
2605:6b00::/32	4.3B × /64	ARIN	CA	14th Jul 2011
2605:6b40::/32	4.3B × /64	ARIN	CA	26th Sept 2019
2605:6b80::/32	4.3B × /64	ARIN	US	14th May 2014
2605:6bc0::/32	4.3B × /64	ARIN	US	27th Sept 2019
2605:6cc0::/32	4.3B × /64	ARIN	US	27th Sept 2019