NumberResearchRecent prefix assignments
338 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.
Most active assignees, last 30 days
New assignments by month
Sep 2026
Aug 2026
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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 |
|---|---|---|---|---|---|---|
| 2001-10-25 | 203-300 | 4XXX5XXX · 2 holders which blocks → | OMNIPOINT COMMUNICATIONS, INC. - CT | 6624 | DANBURY | CT |
| 2001-10-25 | 203-500 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | NEW HAVEN | CT |
| 2001-10-25 | 240-426 | none assigned yet which blocks → | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSHNGTNZN2 | MD |
| 2001-10-25 | 401-250 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7351 | W WARWICK | RI |
| 2001-10-25 | 404-587 | 0XXX2XXX3XXX4XXX5XXX7XXX8XXX which blocks → | METROPCS, INC. | 5562 | ATLANTA | GA |
| 2001-10-25 | 407-278 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | OVIEDO | FL |
| 2001-10-25 | 418-637 | not yet reported which blocks → | Bell Mobility | 6574 | St-Felicien | — |
| 2001-10-25 | 419-606 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | ASHLAND | OH |
| 2001-10-25 | 570-295 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | LOCK HAVEN | PA |
| 2001-10-25 | 832-667 | 8XXX which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 7138 | HOUSTON | TX |
| 2001-10-25 | 860-760 | none assigned yet which blocks → | PAETEC ITEL, LLC | 829J | HARTFORD | CT |
| 2001-10-25 | 860-805 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HARTFORD | CT |
| 2001-10-25 | 865-365 | 1XXX2XXX3XXX4XXX5XXX7XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | SEVIERVL | TN |
| 2001-10-25 | 940-923 | 0XXX2XXX which blocks → | T-MOBILE USA, INC. | 6529 | WICHITAFLS | TX |
| 2001-10-24 | 623-329 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PHOENIX | AZ |
| 2001-10-24 | 623-418 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PHOENIX | AZ |
| 2001-10-24 | 678-698 | not yet reported which blocks → | METROPCS, INC. | 5562 | ATLANTA SO | GA |
| 2001-10-24 | 815-609 | not yet reported which blocks → | ILLINOIS BELL TEL CO | 9329 | PLAINFIELD | IL |
| 2001-10-24 | 856-266 | 9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | MOORESTOWN | NJ |
| 2001-10-24 | 902-252 | not yet reported which blocks → | Bragg Communications Inc. | 4878 | Sackville | — |
| 2001-10-24 | 902-265 | not yet reported which blocks → | Bragg Communications Inc. | 4878 | Shelburne | — |
| 2001-10-24 | 902-341 | not yet reported which blocks → | Bragg Communications Inc. | 4878 | Aylesford | — |
| 2001-10-24 | 902-378 | not yet reported which blocks → | Bragg Communications Inc. | 4878 | Digby | — |
| 2001-10-24 | 902-472 | not yet reported which blocks → | Bragg Communications Inc. | 4878 | Windsor | — |
| 2001-10-24 | 902-724 | not yet reported which blocks → | Bragg Communications Inc. | 4878 | Summerside | — |
| 2001-10-24 | 902-763 | not yet reported which blocks → | Bragg Communications Inc. | 4878 | Springhill | — |
| 2001-10-23 | 214-685 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | METROPCS, INC. | 5562 | GRANDPRARI | TX |
| 2001-10-23 | 225-810 | 0XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → | VOICESTREAM GSM I, LLC | 150C | BATONROUGE | LA |
| 2001-10-23 | 253-470 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → | PAETEC ITEL, LLC | 829J | SUMNER | WA |
| 2001-10-23 | 321-322 | 8XXX9XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | APOPKA | FL |
| 2001-10-23 | 325-998 | 4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BROWNWOOD | TX |
| 2001-10-23 | 435-562 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - UT | 3231 | SALINA | UT |
| 2001-10-23 | 435-571 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - UT | 3231 | PARK CITY | UT |
| 2001-10-23 | 435-625 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - UT | 3231 | BEAVER | UT |
| 2001-10-23 | 435-710 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - UT | 3231 | PAROWAN | UT |
| 2001-10-23 | 435-728 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - UT | 3231 | TOOELE | UT |
| 2001-10-23 | 435-767 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - UT | 3231 | ST GEORGE | UT |
| 2001-10-23 | 435-856 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - UT | 3231 | NEPHI | UT |
| 2001-10-23 | 479-799 | 0XXX2XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | FAYETTEVL | AR |
| 2001-10-23 | 479-926 | 2XXX3XXX4XXX5XXX7XXX8XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | FORT SMITH | AR |
| 2001-10-23 | 515-259 | 0–9 XXXall 10 · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - IA | 985E | DES MOINES | IA |
| 2001-10-23 | 519-964 | not yet reported which blocks → | Zayo Canada Inc. | 8304 | London | — |
| 2001-10-23 | 541-292 | 1XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | MEDFORD | OR |
| 2001-10-23 | 541-295 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | GRANTSPASS | OR |
| 2001-10-23 | 573-677 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | FIDELITY CABLEVISION, LLC | 3356 | CUBA | MO |
| 2001-10-23 | 573-679 | 0XXX3XXX4XXX7XXX · 3 holders which blocks → | FIDELITY CABLEVISION, LLC | 3356 | BOURBON | MO |
| 2001-10-23 | 573-899 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | FIDELITY CABLEVISION, LLC | 3356 | ST JAMES | MO |
| 2001-10-23 | 647-892 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Toronto | — |
| 2001-10-23 | 647-893 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Toronto | — |
| 2001-10-23 | 682-438 | none assigned yet which blocks → | T-MOBILE USA, INC. | 6529 | ARLINGTON | TX |
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.