NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026
The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2012-07-03 | 918-416 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 TELECOM OF OKLAHOMA, LLC - OK | 7632 | CATOOSA | OK |
| 2010-02-19 | 918-236 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 TELECOM OF OKLAHOMA, LLC - OK | 7632 | TULSA | OK |
| 2001-04-05 | 918-806 | 1XXX2XXX6XXX8XXX which blocks → | LEVEL 3 TELECOM OF OKLAHOMA, LLC - OK | 7632 | BROKENARRW | OK |
| — | 918-512 | 0XXX1XXX6XXX8XXX · 3 holders which blocks → | LEVEL 3 TELECOM OF OKLAHOMA, LLC - OK | 7632 | SAPULPA | OK |
| — | 918-513 | 1XXX2XXX3XXX8XXX · 2 holders which blocks → | LEVEL 3 TELECOM OF OKLAHOMA, LLC - OK | 7632 | TULSA | OK |
| — | 918-514 | 0XXX1XXX3XXX4XXX · 4 holders which blocks → | LEVEL 3 TELECOM OF OKLAHOMA, LLC - OK | 7632 | SAND SPG | OK |
| — | 918-515 | 0XXX1XXX5XXX · 2 holders which blocks → | LEVEL 3 TELECOM OF OKLAHOMA, LLC - OK | 7632 | CATOOSA | OK |
| — | 918-516 | 1XXX2XXX5XXX8XXX · 3 holders which blocks → | LEVEL 3 TELECOM OF OKLAHOMA, LLC - OK | 7632 | OWASSO | OK |
| — | 918-517 | 2XXX5XXX6XXX8XXX · 3 holders which blocks → | LEVEL 3 TELECOM OF OKLAHOMA, LLC - OK | 7632 | SPERRY | OK |
| — | 918-518 | 0XXX1XXX5XXX6XXX · 3 holders which blocks → | LEVEL 3 TELECOM OF OKLAHOMA, LLC - OK | 7632 | JENKS | OK |
| — | 918-858 | not yet reported which blocks → | LEVEL 3 TELECOM OF OKLAHOMA, LLC - OK | 7632 | TULSA | OK |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.