Recent prefix assignments
347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026
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 |
|---|---|---|---|---|---|---|
| 2017-06-21 | 720-795 | 0–9 XXXall 10 · 4 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | DENVER | CO |
| 2017-06-20 | 218-250 | 0–9 XXXall 10 · 3 holders which blocks → | MIDCONTINENT COMMUNICATIONS - MN | 429A | LITTLEFORK | MN |
| 2017-06-20 | 234-867 | 0–9 XXXall 10 · 3 holders which blocks → | COMMIO, LLC | 939H | AKRON | OH |
| 2017-06-20 | 240-867 | 0–9 XXXall 10 · 4 holders which blocks → | COMMIO, LLC | 939H | WSHNGTNZN3 | MD |
| 2017-06-20 | 256-285 | 0–9 XXXall 10 · 5 holders which blocks → | AIRUS, INC. - AL | 476H | HUNTSVILLE | AL |
| 2017-06-20 | 317-680 | 0–9 XXXall 10 · 6 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN | 6725 | SHELBYVL | IN |
| 2017-06-20 | 380-867 | 0–9 XXXall 10 · 4 holders which blocks → | COMMIO, LLC | 939H | COLUMBUS | OH |
| 2017-06-20 | 470-322 | 0–9 XXXall 10 · 4 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA | 7435 | ATLANTA | GA |
| 2017-06-20 | 507-870 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → | MIDCONTINENT COMMUNICATIONS - MN | 429A | MINNEOTA | MN |
| 2017-06-20 | 567-420 | 0–9 XXXall 10 · 5 holders which blocks → | COMMIO, LLC | 939H | TOLEDO | OH |
| 2017-06-20 | 612-274 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | TWINCITIES | MN |
| 2017-06-20 | 667-266 | 0–9 XXXall 10 · 4 holders which blocks → | COMMIO, LLC | 939H | SALISBURY | MD |
| 2017-06-20 | 667-867 | 0–9 XXXall 10 · 3 holders which blocks → | COMMIO, LLC | 939H | BALTIMORE | MD |
| 2017-06-20 | 937-739 | 0–9 XXXall 10 · 3 holders which blocks → | COMMIO, LLC | 939H | DAYTON | OH |
| 2017-06-16 | 226-796 | not yet reported which blocks → | Iristel Inc. | 154E | Woodstock | — |
| 2017-06-16 | 249-449 | not yet reported which blocks → | Iristel Inc. | 154E | Orillia | — |
| 2017-06-16 | 587-864 | not yet reported which blocks → | TELUS | 8084 | Calgary | — |
| 2017-06-16 | 628-218 | 0–9 XXXall 10 · 4 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNFC CNTRL | CA |
| 2017-06-16 | 909-407 | 0–9 XXXall 10 · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CLAREMONT | CA |
| 2017-06-16 | 936-263 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | CONROE | TX |
| 2017-06-15 | 209-268 | 0–9 XXXall 10 · 5 holders which blocks → | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | JACKSON | CA |
| 2017-06-15 | 236-304 | not yet reported which blocks → | Iristel Inc. | 154E | North Vancouver | — |
| 2017-06-15 | 346-263 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BAYTOWN | TX |
| 2017-06-15 | 405-724 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - OK | 409F | OKLA CITY | OK |
| 2017-06-15 | 431-806 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2017-06-15 | 437-700 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2017-06-15 | 438-904 | not yet reported which blocks → | Bell Mobility | 6574 | Montreal | — |
| 2017-06-15 | 442-250 | 0–9 XXXall 10 · 3 holders which blocks → | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | CALEXICO | CA |
| 2017-06-15 | 442-266 | 0–9 XXXall 10 · 6 holders which blocks → | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | OCSD OCSD | CA |
| 2017-06-15 | 470-474 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - GA | 067D | CONYERS | GA |
| 2017-06-15 | 509-862 | 0–9 XXXall 10 · 6 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA | 5812 | SPOKANE | WA |
| 2017-06-15 | 520-849 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | TUCSON | AZ |
| 2017-06-15 | 587-909 | not yet reported which blocks → | Bell Mobility | 6574 | Calgary | — |
| 2017-06-15 | 647-908 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2017-06-15 | 657-213 | 0–9 XXXall 10 · 5 holders which blocks → | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | CYPRESS | CA |
| 2017-06-15 | 717-936 | 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | NEWHOLLAND | PA |
| 2017-06-15 | 743-867 | 0–9 XXXall 10 · 4 holders which blocks → | COMMIO, LLC | 939H | GREENSBORO | NC |
| 2017-06-15 | 762-525 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA | 6540 | BLAIRSVL | GA |
| 2017-06-15 | 901-910 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - TN | 525E | COLLIERVL | TN |
| 2017-06-15 | 910-631 | 0–9 XXXall 10 · 5 holders which blocks → | STARVISION, INC. - NC | 703H | CLINTON | NC |
| 2017-06-15 | 910-800 | 0–9 XXXall 10 · 4 holders which blocks → | COMMIO, LLC | 939H | WILMINGTON | NC |
| 2017-06-15 | 970-975 | 0–9 XXXall 10 · 6 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | 6567 | MONTROSE | CO |
| 2017-06-15 | 970-981 | 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 6 holders which blocks → | ZIPPYTECH INC. - CO | 022J | PARACHUTE | CO |
| 2017-06-15 | 980-867 | 0–9 XXXall 10 · 5 holders which blocks → | COMMIO, LLC | 939H | CHARLOTTE | NC |
| 2017-06-14 | 380-200 | 0XXX1XXX2XXX6XXX8XXX9XXX · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - OH | 7532 | CANALWHSTR | OH |
| 2017-06-14 | 551-210 | 0–9 XXXall 10 · 5 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DUMONT | NJ |
| 2017-06-14 | 581-473 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | St-Felicien | — |
| 2017-06-14 | 667-221 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → | TELNYX LLC | 073H | SALISBURY | MD |
| 2017-06-14 | 740-729 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - OH | 464C | ASHVILLE | OH |
| 2017-06-14 | 937-400 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - OH | 464C | JACKSONCTR | OH |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.