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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

66 blocks match, ordered by prefix.

Allocated but unannounced blocks, 51 to 66 of 66
Prefix	Addresses	Registry	Country	Allocated
2604:2d40::/32	4.3B × /64	ARIN	PR	31st Mar 2017
2604:da00::/32	4.3B × /64	ARIN	PR	2nd Feb 2026
2605:4700::/32	4.3B × /64	ARIN	PR	21st Apr 2014
2605:5d40::/32	4.3B × /64	ARIN	PR	5th Aug 2019
2605:7340::/32	4.3B × /64	ARIN	PR	16th Oct 2019
2606:4140::/32	4.3B × /64	ARIN	PR	12th Apr 2021
2606:a9c0::/32	4.3B × /64	ARIN	PR	26th Jan 2022
2607:5b40::/32	4.3B × /64	ARIN	PR	17th Jul 2023
2607:8a80::/32	4.3B × /64	ARIN	PR	18th Aug 2016
2607:a380::/32	4.3B × /64	ARIN	PR	12th Sept 2016
2607:b340::/32	4.3B × /64	ARIN	PR	7th May 2024
2607:c500::/32	4.3B × /64	ARIN	PR	26th Jun 2026
2607:c740::/32	4.3B × /64	ARIN	PR	19th Jul 2024
2607:edc0::/32	4.3B × /64	ARIN	PR	8th Jan 2025
2620:102:b000::/47	131k × /64	ARIN	PR	7th Mar 2011
2620:7f:3830::/48	65.5k × /64	ARIN	PR	19th Dec 2025