Full /8 IPv4 Address Block Holders in 2025

January 4, 2026

Here, I tried to collect entities that owned full /8 IPv4 address block(s) in 2025.

A more comprehensive and historical list can be found at https://en.wikipedia.org/wiki/List_of_assigned_/8_IPv4_address_blocks.

3.0.0.0/8 - Amazon
6.0.0.0/8 - US Department of Defense
7.0.0.0/8 - US Department of Defense
11.0.0.0/8 - US Department of Defense
12.0.0.0/8 - AT&T Services
17.0.0.0/8 - Apple Inc
19.0.0.0/8 - Ford Motor Company
21.0.0.0/8 - US Department of Defense
22.0.0.0/8 - US Department of Defense
25.0.0.0/8 - UK Ministry of Defense
26.0.0.0/8 - US Department of Defense
28.0.0.0/8 - US Department of Defense
29.0.0.0/8 - US Department of Defense
38.0.0.0/8 - Cogent Communications
53.0.0.0/8 - Mercedes-Benz Group AG
55.0.0.0/8 - US Department of Defense
73.0.0.0/8 - Comcast Corporation
214.0.0.0/8 - US Department of Defense
215.0.0.0/8 - US Department of Defense

Some notable mentions:

I would have loved to include 4.0.0.0/8 and 8.0.0.0/8 with Lumen/Level 3 or 9.0.0.0/8 with IBM but parts of the address space have been handed out to other entities, like 8.8.4.0/24 and 8.8.8.0/24 for Google Public DNS and 9.9.9.0/24 for Quad9.
Then there were other famous netblocks like 18.0.0.0/8 with MIT and 44.0.0.0/8 which was with Amateur Packet Radio Network broken and brought up by Amazon. Amazon keeps on buying more and more of IPv4 address space. Right now, they’re the second highest IPv4 address space holder with 168+ million addresses under them, right behind the US DoD, which has more due to legacy reasons.

Note - HE’s list mentions addresses originated (not just owned). Providers also advertise prefixes owned by their customers in Bring Your Own IP (BYOIP) setups. The number of address space owned by entity would “mostly” be more than their customer owned space (originated by the entity).

There’s also 126.0.0.0/8 which is mostly Softbank.