NumberResearchRecent prefix assignments
334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026
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 |
|---|---|---|---|---|---|---|
| 2005-06-03 | 707-981 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | PTLM MAIN | CA |
| 2005-06-03 | 760-904 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | PALM SPG | CA |
| 2005-06-03 | 785-953 | 0–9 XXXall 10 · 8 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS | 6532 | OAKLEY | KS |
| 2005-06-03 | 831-920 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | MONTEREY | CA |
| 2005-06-03 | 951-579 | 0–9 XXXall 10 · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ELSINORE | CA |
| 2005-06-02 | 202-701 | 0–9 XXXall 10 · 3 holders which blocks → | VERIZON WASHINGTON DC, INC. | 9211 | WSHNGTNZN1 | DC |
| 2005-06-02 | 248-313 | 0–9 XXXall 10 · 8 holders which blocks → | PAETEC ITEL, LLC | 829J | WALLEDLAKE | MI |
| 2005-06-02 | 269-455 | 0–9 XXXall 10 · 8 holders which blocks → | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | SAUGATUCK | MI |
| 2005-06-02 | 615-785 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | MURFREESBO | TN |
| 2005-06-02 | 903-603 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MABANK | TX |
| 2005-06-02 | 928-550 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | SOMERTON | AZ |
| 2005-06-02 | 951-816 | 0–9 XXXall 10 · 7 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | MURRIETA | CA |
| 2005-06-01 | 303-396 | 0–9 XXXall 10 · 5 holders which blocks → | LIVE WIRE NETWORKS, INC. - CO | 3044 | DENVER | CO |
| 2005-06-01 | 406-471 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | KALISPELL | MT |
| 2005-06-01 | 408-786 | 0–9 XXXall 10 · 5 holders which blocks → | XO CALIFORNIA, INC. | 7262 | SNJS NORTH | CA |
| 2005-06-01 | 530-923 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | MARYSVILLE | CA |
| 2005-06-01 | 670-237 | not yet reported which blocks → | MICRONESIAN TELECOMMUNICATIONS CORPORATION | 3700 | SAIPAN | — |
| 2005-06-01 | 712-584 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SPENCER | IA |
| 2005-06-01 | 740-792 | 0–9 XXXall 10 · 6 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | STEUBENVL | OH |
| 2005-06-01 | 757-385 | 0–9 XXXwhole prefix which blocks → | VERIZON SOUTH, INC. - VA (CONTEL) | 0233 | NRFOLKZON4 | VA |
| 2005-06-01 | 757-389 | 0–9 XXXall 10 · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | NRFOLKZON1 | VA |
| 2005-05-31 | 248-773 | 0–9 XXXall 10 · 7 holders which blocks → | PAETEC ITEL, LLC | 829J | NORTHVILLE | MI |
| 2005-05-31 | 270-425 | 0–9 XXXall 10 · 7 holders which blocks → | POWERTEL KENTUCKY LICENSES, INC. | 365C | DAWSON SPG | KY |
| 2005-05-31 | 309-885 | 0–9 XXXall 10 · 8 holders which blocks → | BRIGHTSPEED OF ILLINOIS, LLC | 1057 | PEKIN | IL |
| 2005-05-31 | 404-552 | 0–9 XXXall 10 · 2 holders which blocks → | METROPCS, INC. | 5562 | ATLANTA | GA |
| 2005-05-31 | 414-269 | 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - WI | 5489 | MILWAUKZN1 | WI |
| 2005-05-31 | 480-254 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | PHOENIX | AZ |
| 2005-05-31 | 573-303 | 0–9 XXXall 10 · 5 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7432 | COLUMBIA | MO |
| 2005-05-31 | 575-973 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM | 6573 | RUIDOSO | NM |
| 2005-05-31 | 614-915 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | COLUMBUS | OH |
| 2005-05-31 | 618-510 | 0XXX9XXX · 2 holders which blocks → | MCC TELEPHONY LLC | 593K | ST ELMO | IL |
| 2005-05-31 | 757-609 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - VA | 8825 | NRFOLKZON1 | VA |
| 2005-05-31 | 775-229 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NV | 4805 | RENO | NV |
| 2005-05-31 | 775-990 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NV | 4805 | PAHRUMP | NV |
| 2005-05-31 | 804-381 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - VA | 8825 | RICHMOND | VA |
| 2005-05-31 | 912-362 | 4XXX6XXX7XXX8XXX · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | METTER | GA |
| 2005-05-31 | 989-945 | 0–9 XXXall 10 · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | OVID | MI |
| 2005-05-30 | 519-207 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | St. Thomas | — |
| 2005-05-30 | 709-641 | not yet reported which blocks → | Aliant Telecom (NF) | 8085 | Stephenville | — |
| 2005-05-30 | 709-787 | not yet reported which blocks → | Aliant Telecom (NF) | 8085 | Bay Roberts | — |
| 2005-05-30 | 780-651 | not yet reported which blocks → | Bell West Inc. | 2933 | St. Albert | — |
| 2005-05-27 | 240-821 | 0–9 XXXall 10 · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | WSHNGTNZN3 | MD |
| 2005-05-27 | 317-688 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - IN | 4803 | CARMEL | IN |
| 2005-05-27 | 514-477 | not yet reported which blocks → | TELUS Quebec | 2243 | Ile-Perrot | — |
| 2005-05-27 | 519-205 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Strathroy | — |
| 2005-05-27 | 519-206 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | St. Jacobs | — |
| 2005-05-27 | 519-208 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Kitchener-Waterloo | — |
| 2005-05-27 | 519-210 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Elmira | — |
| 2005-05-27 | 519-213 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Breslau | — |
| 2005-05-27 | 519-214 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Baden | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.