NumberResearchRecent prefix assignments
358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026
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.
Most active assignees, last 30 days
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2005-01-20 | 418-303 | not yet reported which blocks → | Videotron Ltd. | 8306 | Laterriere | — |
| 2005-01-20 | 418-309 | not yet reported which blocks → | Videotron Ltd. | 8306 | St-Fulgence | — |
| 2005-01-20 | 570-787 | 7XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WELLSBORO | PA |
| 2005-01-20 | 601-557 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MS | 5178 | QUITMAN | MS |
| 2005-01-20 | 601-884 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MS | 5178 | SHUBUTA | MS |
| 2005-01-20 | 606-402 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY | 6500 | AUGUSTA | KY |
| 2005-01-20 | 609-775 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | TRENTON | NJ |
| 2005-01-20 | 636-755 | 0–9 XXXall 10 · 7 holders which blocks → | BRIGHTSPEED OF MISSOURI, LLC | 9787 | DARDENNE | MO |
| 2005-01-20 | 647-429 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Toronto | — |
| 2005-01-20 | 662-847 | 5XXX7XXX which blocks → | PAETEC ITEL, LLC | 829J | TUPELO | MS |
| 2005-01-20 | 706-870 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BRASELTON | GA |
| 2005-01-20 | 864-715 | 0–9 XXXall 10 · 5 holders which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | LAURENS | SC |
| 2005-01-20 | 905-600 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Streetsville | — |
| 2005-01-20 | 973-991 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | NEWARK | NJ |
| 2005-01-19 | 231-399 | 0–9 XXXall 10 · 6 holders which blocks → | ACD TELECOM, INC. - MI | 3535 | FRANKFORT | MI |
| 2005-01-19 | 231-450 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | HESPERIA | MI |
| 2005-01-19 | 231-515 | 0–9 XXXall 10 · 5 holders which blocks → | ACD TELECOM, INC. - MI | 3535 | EVART | MI |
| 2005-01-19 | 231-678 | 7XXX8XXX · 2 holders which blocks → | ACD TELECOM, INC. - MI | 3535 | BRETHREN | MI |
| 2005-01-19 | 231-774 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | ACD TELECOM, INC. - MI | 3535 | INTERLOCHN | MI |
| 2005-01-19 | 231-805 | 1XXX7XXX · 2 holders which blocks → | ACD TELECOM, INC. - MI | 3535 | KALEVA | MI |
| 2005-01-19 | 231-994 | 0–9 XXXall 10 · 6 holders which blocks → | ACD TELECOM, INC. - MI | 3535 | LKLEELANAU | MI |
| 2005-01-19 | 905-200 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Castlemore | — |
| 2005-01-19 | 905-255 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Malton | — |
| 2005-01-19 | 905-400 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Gormley | — |
| 2005-01-19 | 905-402 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Cooksville | — |
| 2005-01-19 | 905-500 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Brampton | — |
| 2005-01-19 | 905-585 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Maple | — |
| 2005-01-19 | 905-663 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Woodbridge | — |
| 2005-01-19 | 905-700 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Keswick | — |
| 2005-01-18 | 229-303 | 0–9 XXXall 10 · 2 holders which blocks → | MCC TELEPHONY LLC | 593K | ALAPAHA | GA |
| 2005-01-18 | 320-464 | 4XXX6XXX which blocks → | ONVOY, LLC - MN | 184D | COSMOS | MN |
| 2005-01-18 | 519-280 | not yet reported which blocks → | Bell Mobility | 6574 | London | — |
| 2005-01-18 | 607-472 | 2XXX4XXX5XXX6XXX · 2 holders which blocks → | LEVEL 3 TELECOM OF NEW YORK, LP - NY | 8473 | BINGHAMTON | NY |
| 2005-01-18 | 678-703 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 TELECOM OF GEORGIA, LP - GA | 7490 | ATLANTA NW | GA |
| 2005-01-18 | 678-955 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 TELECOM OF GEORGIA, LP - GA | 7490 | ATLANTA NE | GA |
| 2005-01-18 | 678-970 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 TELECOM OF GEORGIA, LP - GA | 7490 | ATLANTA NE | GA |
| 2005-01-18 | 706-815 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 TELECOM OF GEORGIA, LP - GA | 7490 | COLUMBUS | GA |
| 2005-01-18 | 816-949 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 TELECOM OF KANSAS CITY, LLC - MO | 7589 | KANSASCITY | MO |
| 2005-01-18 | 845-772 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PINEISLAND | NY |
| 2005-01-18 | 905-292 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Richmond Hill | — |
| 2005-01-18 | 905-300 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Unionville | — |
| 2005-01-18 | 905-350 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Markham | — |
| 2005-01-18 | 905-395 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Aurora | — |
| 2005-01-18 | 905-398 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Oak Ridges | — |
| 2005-01-18 | 905-710 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Newmarket | — |
| 2005-01-18 | 913-273 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 TELECOM OF KANSAS CITY, LLC - KS | 7014 | KANSASCITY | KS |
| 2005-01-17 | 909-354 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ONTARIO | CA |
| 2005-01-14 | 228-456 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | BILOXI | MS |
| 2005-01-14 | 228-567 | 2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | PASCAGOULA | MS |
| 2005-01-14 | 228-678 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → | PAETEC ITEL, LLC | 829J | GULFPORT | MS |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.