Shared address space used by ISPs for carrier-grade NAT. Not routable on the public internet; allows providers to run large NAT pools without colliding with private RFC 1918 space.
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. 100.120.127.0/24 is a sub-block of 100.64.0.0/10, the defining reserved range.
First and last addresses in 100.120.127.0/24
100.120.127.0/24 runs from 100.120.127.0 to 100.120.127.255.
BGP Routing
Live BGP anomalies →Not announced as an exact prefix — covered by the announced supernet 100.120.0.0/17.
Frequently Asked Questions
What is 100.120.127.0/24?
100.120.127.0/24 falls inside 100.64.0.0/10 — a Carrier-grade NAT (CGN) range reserved by RFC 6598. Shared address space used by ISPs for carrier-grade NAT. Not routable on the public internet; allows providers to run large NAT pools without colliding with private RFC 1918 space.
Is 100.120.127.0/24 routable on the public internet?
No. 100.120.127.0/24 is part of IANA-reserved special-use space (100.64.0.0/10, RFC 6598). Packets with these addresses are either filtered by backbone routers or handled as local/special traffic — they never reach the public internet.
Who owns 100.120.127.0/24?
100.120.127.0/24 is not allocated to any organization or ISP. It is part of the Carrier-grade NAT (CGN) block reserved by IANA under RFC 6598 for every network to use privately.
