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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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, 26351 to 26400 of 30441
Prefix	Addresses	Registry	Country	Allocated
2606:2e40::/32	4.3B × /64	ARIN	US	11th Mar 2021
2606:2ec0::/32	4.3B × /64	ARIN	US	11th Mar 2021
2606:2f00::/32	4.3B × /64	ARIN	US	13th Oct 2011
2606:300::/32	4.3B × /64	ARIN	US	20th Sept 2011
2606:3040::/32	4.3B × /64	ARIN	US	15th Mar 2021
2606:30c0::/32	4.3B × /64	ARIN	US	15th Mar 2021
2606:3100::/32	4.3B × /64	ARIN	CA	13th Oct 2011
2606:3140::/32	4.3B × /64	ARIN	CA	16th Mar 2021
2606:31c0::/32	4.3B × /64	ARIN	US	17th Mar 2021
2606:3200::/32	4.3B × /64	ARIN	US	4th Feb 2011
2606:32c0::/32	4.3B × /64	ARIN	US	18th Mar 2021
2606:3480::/32	4.3B × /64	ARIN	US	22nd Jun 2015
2606:3500::/32	4.3B × /64	ARIN	US	14th Oct 2011
2606:3540::/32	4.3B × /64	ARIN	US	23rd Mar 2021
2606:35c0::/32	4.3B × /64	ARIN	US	25th Mar 2021
2606:3880::/32	4.3B × /64	ARIN	US	25th Jun 2015
2606:3940::/32	4.3B × /64	ARIN	US	30th Mar 2021
2606:3980::/36	268M × /64	ARIN	US	29th Jun 2015
2606:39c0::/32	4.3B × /64	ARIN	US	31st Mar 2021
2606:3a40::/32	4.3B × /64	ARIN	US	31st Mar 2021
2606:3ac0::/32	4.3B × /64	ARIN	US	31st Mar 2021
2606:3b40::/32	4.3B × /64	ARIN	US	1st Apr 2021
2606:3bc0::/32	4.3B × /64	ARIN	US	2nd Apr 2021
2606:3cc0::/32	4.3B × /64	ARIN	US	6th Apr 2021
2606:3e00::/32	4.3B × /64	ARIN	US	7th Feb 2011
2606:3e40::/32	4.3B × /64	ARIN	US	8th Apr 2021
2606:3e80::/32	4.3B × /64	ARIN	US	2nd Jul 2015
2606:3ec0::/32	4.3B × /64	ARIN	US	9th Apr 2021
2606:3f00::/32	4.3B × /64	ARIN	US	26th Oct 2011
2606:4000::/32	4.3B × /64	ARIN	US	25th Feb 2010
2606:4080::/32	4.3B × /64	ARIN	US	6th Jul 2015
2606:4140::/32	4.3B × /64	ARIN	PR	12th Apr 2021
2606:4380::/32	4.3B × /64	ARIN	CA	8th Jul 2015
2606:4400::/32	4.3B × /64	ARIN	US	8th Sept 2010
2606:4430::/32	4.3B × /64	ARIN	US	8th Jul 2026
2606:4490::/32	4.3B × /64	ARIN	US	8th Jul 2026
2606:4500::/32	4.3B × /64	ARIN	US	31st Oct 2011
2606:46c0::/32	4.3B × /64	ARIN	US	22nd Apr 2021
2606:47c0::/32	4.3B × /64	ARIN	US	23rd Apr 2021
2606:480::/32	4.3B × /64	ARIN	BM	4th Mar 2015
2606:4940::/32	4.3B × /64	ARIN	US	27th Apr 2021
2606:4980::/32	4.3B × /64	ARIN	US	13th Jul 2015
2606:49c0::/32	4.3B × /64	ARIN	CA	7th May 2026
2606:4a40::/32	4.3B × /64	ARIN	US	28th Apr 2021
2606:4a80::/32	4.3B × /64	ARIN	US	13th Jul 2015
2606:4ac0::/32	4.3B × /64	ARIN	CA	29th Apr 2021
2606:4b80::/32	4.3B × /64	ARIN	US	14th Jul 2015
2606:4c00::/33	2.1B × /64	ARIN	US	9th Sept 2010
2606:4c0::/32	4.3B × /64	ARIN	US	28th Oct 2020
2606:4e40::/32	4.3B × /64	ARIN	US	10th May 2021