243.0.0.172
Reserved for future use (240.0.0.0/4) — set aside by IANA but never deployed; some proposals to reclaim this space for general allocation. These addresses are not routable on the public Internet and are excluded from search-engine indexing.
Frequently Asked Questions
Why is 243.0.0.172 reserved?
243.0.0.172 is part of a reserved address block: Reserved for future use (240.0.0.0/4) — set aside by IANA but never deployed; some proposals to reclaim this space for general allocation. Reserved addresses are not routable on the public internet and are typically used for private networks, loopback testing, or documentation purposes.
Can I use 243.0.0.172 on my network?
If 243.0.0.172 falls within a private-use range (like 10.0.0.0/8, 172.16.0.0/12, or 192.168.0.0/16), you can use it freely on your local network. It will not be reachable from the public internet.
Neighbors
Other addresses in the same /24.
