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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

27,001 blocks match, ordered by prefix.

Allocated but unannounced blocks, 23001 to 23050 of 27001
Prefix	Addresses	Registry	Country	Allocated
2606:6cc0::/32	4.3B × /64	ARIN	US	16th Aug 2021
2606:6d40::/32	4.3B × /64	ARIN	US	16th Aug 2021
2606:6e40::/32	4.3B × /64	ARIN	US	18th Aug 2021
2606:6f00::/32	4.3B × /64	ARIN	US	18th Nov 2011
2606:6f40::/32	4.3B × /64	ARIN	US	19th Aug 2021
2606:6fc0::/32	4.3B × /64	ARIN	US	19th Aug 2021
2606:71c0::/32	4.3B × /64	ARIN	US	24th Aug 2021
2606:7300::/32	4.3B × /64	ARIN	US	23rd Nov 2011
2606:7400::/32	4.3B × /64	ARIN	US	14th Sept 2010
2606:7500::/32	4.3B × /64	ARIN	US	23rd Nov 2011
2606:7580::/32	4.3B × /64	ARIN	US	1st Sept 2015
2606:7600::/32	4.3B × /64	ARIN	US	8th Feb 2011
2606:7640::/32	4.3B × /64	ARIN	US	2nd Sept 2021
2606:77c0::/32	4.3B × /64	ARIN	US	10th Sept 2021
2606:780::/32	4.3B × /64	ARIN	US	9th Mar 2015
2606:7840::/32	4.3B × /64	ARIN	US	10th Sept 2021
2606:78c0::/32	4.3B × /64	ARIN	US	10th Sept 2021
2606:7ac0::/32	4.3B × /64	ARIN	US	14th Sept 2021
2606:7b00::/32	4.3B × /64	ARIN	US	28th Nov 2011
2606:7b80::/32	4.3B × /64	ARIN	US	3rd Sept 2015
2606:7dc0::/32	4.3B × /64	ARIN	US	24th Sept 2021
2606:7f40::/32	4.3B × /64	ARIN	US	30th Sept 2021
2606:7f80::/32	4.3B × /64	ARIN	US	10th Sept 2015
2606:7fc0::/32	4.3B × /64	ARIN	US	1st Oct 2021
2606:8040::/32	4.3B × /64	ARIN	US	4th Oct 2021
2606:8080::/32	4.3B × /64	ARIN	US	14th Sept 2015
2606:80c0::/32	4.3B × /64	ARIN	US	4th Oct 2021
2606:8100::/32	4.3B × /64	ARIN	US	1st Dec 2011
2606:8280::/36	268M × /64	ARIN	US	15th Sept 2015
2606:8380::/32	4.3B × /64	ARIN	US	16th Sept 2015
2606:8480::/32	4.3B × /64	ARIN	US	17th Sept 2015
2606:8500::/32	4.3B × /64	ARIN	US	2nd Dec 2011
2606:8540::/32	4.3B × /64	ARIN	US	14th Oct 2021
2606:8580::/32	4.3B × /64	ARIN	US	22nd Sept 2015
2606:85c0::/32	4.3B × /64	ARIN	US	15th Oct 2021
2606:86c0::/32	4.3B × /64	ARIN	US	26th Oct 2021
2606:8740::/32	4.3B × /64	ARIN	US	26th Oct 2021
2606:87c0::/32	4.3B × /64	ARIN	US	26th Oct 2021
2606:8880::/32	4.3B × /64	ARIN	US	23rd Sept 2015
2606:88c0::/32	4.3B × /64	ARIN	US	29th Oct 2021
2606:8a80::/32	4.3B × /64	ARIN	US	25th Sept 2015
2606:8b00::/32	4.3B × /64	ARIN	US	9th Dec 2011
2606:8bc0::/32	4.3B × /64	ARIN	US	8th Nov 2021
2606:8c0::/32	4.3B × /64	ARIN	US	9th Nov 2020
2606:8f40::/32	4.3B × /64	ARIN	US	17th Nov 2021
2606:9000::/32	4.3B × /64	ARIN	US	5th Oct 2012
2606:9040::/32	4.3B × /64	ARIN	US	18th Nov 2021
2606:90c0::/32	4.3B × /64	ARIN	US	18th Nov 2021
2606:9180::/32	4.3B × /64	ARIN	US	1st Oct 2015
2606:91c0::/32	4.3B × /64	ARIN	US	19th Nov 2021