NumberResearchRecent prefix assignments
357 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026
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
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Dec 2025
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2022-07-01 | 650-640 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNCRL-BLMT | CA |
| 2022-07-01 | 651-392 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN | 5816 | TWINCITIES | MN |
| 2022-07-01 | 669-317 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS NORTH | CA |
| 2022-07-01 | 945-260 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TX | 004F | FRISCO | TX |
| 2022-07-01 | 945-261 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TX | 004F | GRANDPRARI | TX |
| 2022-07-01 | 971-431 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OR | 076F | GRESHAM | OR |
| 2022-07-01 | 971-433 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OR | 076F | SALEM | OR |
| 2022-06-30 | 240-932 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - MD | 071F | WSNG236Z14 | MD |
| 2022-06-30 | 249-456 | not yet reported which blocks → | Fibernetics Corporation | 464D | Algoma Mills | — |
| 2022-06-30 | 249-457 | not yet reported which blocks → | Fibernetics Corporation | 464D | Batchawana Bay | — |
| 2022-06-30 | 249-458 | not yet reported which blocks → | Fibernetics Corporation | 464D | Blind River | — |
| 2022-06-30 | 343-506 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Lancaster | — |
| 2022-06-30 | 423-275 | 0–9 XXXall 10 · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | CHATTNOOGA | TN |
| 2022-06-30 | 424-472 | 0–9 XXXall 10 · 6 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | BEVERLYHLS | CA |
| 2022-06-30 | 431-318 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Edwin | — |
| 2022-06-30 | 431-319 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Portage La Prairie | — |
| 2022-06-30 | 559-806 | 0–9 XXXall 10 · 5 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | VISALIA | CA |
| 2022-06-30 | 559-828 | 0XXX2XXX6XXX7XXX · 3 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SELMA | CA |
| 2022-06-30 | 581-689 | not yet reported which blocks → | Fibernetics Corporation | 464D | Quebec | — |
| 2022-06-30 | 629-279 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | GOODLETSVL | TN |
| 2022-06-30 | 639-852 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Davidson | — |
| 2022-06-30 | 639-853 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Fort Qu'Appelle | — |
| 2022-06-30 | 639-854 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Kipling | — |
| 2022-06-30 | 672-867 | not yet reported which blocks → | Fibernetics Corporation | 464D | Vancouver | — |
| 2022-06-30 | 858-321 | 0–9 XXXall 10 · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | SNDG SNDG | CA |
| 2022-06-30 | 873-287 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | St-Donat-de-Montcalm | — |
| 2022-06-30 | 931-367 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CLARKSVL | TN |
| 2022-06-29 | 213-609 | 0–9 XXXall 10 · 4 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | LSAN DA 09 | CA |
| 2022-06-29 | 240-930 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | LAUREL238 | MD |
| 2022-06-29 | 279-225 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SCRM NORTH | CA |
| 2022-06-29 | 302-412 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - DE | 073F | LEWES | DE |
| 2022-06-29 | 321-429 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - FL | 982E | MELBOURNE | FL |
| 2022-06-29 | 337-799 | 0–9 XXXall 10 · 2 holders which blocks → | TERRA NOVA TELECOM INC. | 145J | LAFAYETTE | LA |
| 2022-06-29 | 346-564 | 0–9 XXXwhole prefix which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | HOUSTON | TX |
| 2022-06-29 | 346-565 | 0–9 XXXwhole prefix which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | HOUSTON | TX |
| 2022-06-29 | 424-474 | 0–9 XXXall 10 · 4 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | CULVERCITY | CA |
| 2022-06-29 | 435-288 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ST GEORGE | UT |
| 2022-06-29 | 442-374 | 0XXX1XXX2XXX3XXX7XXX · 3 holders which blocks → | COMMIO, LLC | 939H | FALLBROOK | CA |
| 2022-06-29 | 442-376 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | ESCONDIDO | CA |
| 2022-06-29 | 442-383 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | DSERTHTSPG | CA |
| 2022-06-29 | 480-873 | 0–9 XXXall 10 · 2 holders which blocks → | QWEST CORPORATION | 9636 | PHOENIX | AZ |
| 2022-06-29 | 504-422 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | NEWORLEANS | LA |
| 2022-06-29 | 530-705 | 0XXX4XXX7XXX · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | CHALLENGE | CA |
| 2022-06-29 | 530-769 | 0XXX which blocks → | COMMIO, LLC | 939H | HOOPA | CA |
| 2022-06-29 | 530-791 | 0–9 XXXall 10 · 2 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | ANDERSON | CA |
| 2022-06-29 | 530-808 | 0–9 XXXall 10 · 4 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | DAVIS | CA |
| 2022-06-29 | 530-810 | 0–9 XXXall 10 · 5 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | BIGGS | CA |
| 2022-06-29 | 530-834 | 0XXX1XXX7XXX8XXX · 3 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | GRVY MAIN | CA |
| 2022-06-29 | 567-389 | 0–9 XXXall 10 · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | TOLEDO | OH |
| 2022-06-29 | 651-391 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | TWINCITIES | MN |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.