RIO prefixes in area code 309
NANPA records 3 assigned NXX blocks to rate center RIO in area code 309, 0.4% of the 786 blocks assigned in the code. A rate center is the billing geography a block is allocated to – NANPA truncates the name to ten characters, so read it as a NANPA label rather than a town. 3 holders hold those blocks, the largest being STRATUS NETWORKS (1), CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL (1), ONEIDA NETWORK SERVICES, INC. (1). The earliest assignment on record here is 2020-09-17 and the most recent 2020-09-17. 2 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area code 920 – overlay codes cover the same geography, so a rate center is served by all of them.
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 309-805 | STRATUS NETWORKS | 2020-09-17 | yes | yes |
| 309-872 | Frontier CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL | – | yes | yes |
| 309-972 | ONEIDA NETWORK SERVICES, INC. | – | no | yes |
The holder is who received the block from the numbering administrator. It is not necessarily the carrier serving a given number: numbers move with their owners, and a pooled block is shared.
Who holds the blocks
| Holder | Brand | Blocks | Share here |
|---|---|---|---|
| STRATUS NETWORKS | – | 1 | 33.3% |
| CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL | Frontier | 1 | 33.3% |
| ONEIDA NETWORK SERVICES, INC. | – | 1 | 33.3% |
Frequently asked
Which prefixes belong to RIO in area code 309?
3 blocks: 805, 872, 972. The table above gives the holder of each.
Which carriers have numbers in RIO?
STRATUS NETWORKS (1 block), CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL (1 block), ONEIDA NETWORK SERVICES, INC. (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is RIO a city?
It is a rate center – the unit NANPA allocates number blocks to. Its name is abbreviated to ten characters and is not necessarily a settlement: we print it as recorded rather than guess at the full name.