British Indian Ocean Territory (IO) - IPv4 address delegations
Data from RIR websites as of: Mon Jan 12 2026
Most IPv4 delegations correspond to a single "/PrefixLength" address range.
Some IPv4 delegations correspond to several consecutive "/PrefixLength" ranges with the same holder, aggregated together in a single delegation (for example a /23 and the following /24 aggregated in a delegation with 768 addresses). In this case, colum "Prefix" in the following table contains the keyword "Aggreg", and the entry in the text file appears as "FirstAddress-LastAddress".
| APNIC Delegations |
| Zone |
Country |
Parameter |
First |
Last |
Prefix |
Number |
Date |
Status |
| APNIC |
IO |
IPv4 |
202.44.112.0 |
202.44.115.255 |
/22 |
1 024 |
2000-11-16 |
Allocated |
| APNIC |
IO |
IPv4 |
203.83.48.0 |
203.83.55.255 |
/21 |
2 048 |
2006-01-19 |
Allocated |
