Class E block reserved by the IETF for future use. Not currently routable on the public internet and not in general operational use.
This range is reserved by IANA — it is not allocated to an organization, ISP, or regional internet registry. Addresses here appear on every private/internal network that follows the standard, so lookups will not identify a specific owner.
Ranges inside 240.0.0.0/4
| CIDR | IPs | Organization | ASN | Country |
|---|---|---|---|---|
| 240.0.0.0/4 | 268.44M | — | — | — |
| 255.255.255.255/32 | 1 | — | — | — |
First 256 of 268,435,456 IP addresses in 240.0.0.0/4
Frequently Asked Questions
What is 240.0.0.0/4?
240.0.0.0/4 falls inside 240.0.0.0/4 — a Reserved for future use range reserved by RFC 1112. Class E block reserved by the IETF for future use. Not currently routable on the public internet and not in general operational use.
Is 240.0.0.0/4 routable on the public internet?
No. 240.0.0.0/4 is part of IANA-reserved special-use space (240.0.0.0/4, RFC 1112). Packets with these addresses are either filtered by backbone routers or handled as local/special traffic — they never reach the public internet.
Who owns 240.0.0.0/4?
240.0.0.0/4 is not allocated to any organization or ISP. It is part of the Reserved for future use block reserved by IANA under RFC 1112 for every network to use privately.
