NumberResearchRecent prefix assignments
354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026
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 |
|---|---|---|---|---|---|---|
| 2003-11-04 | 660-228 | 1XXX2XXX6XXX7XXX8XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | MONTROSE | MO |
| 2003-11-04 | 660-230 | 1XXX2XXX3XXX7XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | CALHOUN | MO |
| 2003-11-04 | 660-231 | 1XXX4XXX7XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | DEEPWATER | MO |
| 2003-11-04 | 830-287 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | PEERLESS NETWORK OF TEXAS, LLC - TX | 177F | SUTHELDSPG | TX |
| 2003-11-04 | 843-922 | 0XXX1XXX2XXX7XXX9XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | HARLEYVL | SC |
| 2003-11-03 | 418-620 | not yet reported which blocks → | Videotron Ltd. | 8306 | La Malbaie | — |
| 2003-11-03 | 418-760 | not yet reported which blocks → | Videotron Ltd. | 8306 | Baie-St-Paul | — |
| 2003-11-03 | 418-960 | not yet reported which blocks → | TELUS Quebec | 8083 | Sept-Iles | — |
| 2003-11-03 | 678-452 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → | ETC COMMUNICATIONS, L.L.C. - GA | 205D | MARBLEHILL | GA |
| 2003-11-03 | 806-544 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | LUBBOCK | TX |
| 2003-11-03 | 832-262 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | BAYTOWN | TX |
| 2003-11-03 | 905-620 | not yet reported which blocks → | Bell Canada | 8051 | Brooklin | — |
| 2003-11-02 | 423-299 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | BENTON | TN |
| 2003-11-02 | 931-251 | 0–9 XXXall 10 · 6 holders which blocks → | POWERTEL NASHVILLE LICENSES, INC. | 7476 | FAYETTEVL | TN |
| 2003-10-31 | 509-956 | 0–9 XXXall 10 · 5 holders which blocks → | METROPCS, INC. | 5562 | WALLAWALLA | WA |
| 2003-10-31 | 715-722 | 0–9 XXXall 10 · 5 holders which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | MERRILL | WI |
| 2003-10-31 | 720-343 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - CO | 6118 | DENVER | CO |
| 2003-10-31 | 785-338 | 0–9 XXXall 10 · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - KS | 7593 | TOPEKA | KS |
| 2003-10-30 | 217-890 | 1XXX which blocks → | ONVOY, LLC | 224C | RANTOUL | IL |
| 2003-10-30 | 218-239 | none assigned yet which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN | 5816 | BLACKDUCK | MN |
| 2003-10-30 | 225-410 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - LA | 3232 | BATONROUGE | LA |
| 2003-10-30 | 228-237 | not yet reported which blocks → | TELEPAK NETWORKS, INC. - MS | 5278 | VANCLEAVE | MS |
| 2003-10-30 | 228-247 | not yet reported which blocks → | TELEPAK NETWORKS, INC. - MS | 5278 | HURLEY | MS |
| 2003-10-30 | 228-248 | not yet reported which blocks → | TELEPAK NETWORKS, INC. - MS | 5278 | GULFPORT | MS |
| 2003-10-30 | 228-258 | not yet reported which blocks → | TELEPAK NETWORKS, INC. - MS | 5278 | PASCAGOULA | MS |
| 2003-10-30 | 228-259 | not yet reported which blocks → | TELEPAK NETWORKS, INC. - MS | 5278 | PEARLINGTN | MS |
| 2003-10-30 | 228-266 | not yet reported which blocks → | TELEPAK NETWORKS, INC. - MS | 5278 | OCEAN SPG | MS |
| 2003-10-30 | 228-267 | not yet reported which blocks → | TELEPAK NETWORKS, INC. - MS | 5278 | BILOXI | MS |
| 2003-10-30 | 228-268 | not yet reported which blocks → | TELEPAK NETWORKS, INC. - MS | 5278 | PASSCHRSTN | MS |
| 2003-10-30 | 228-270 | not yet reported which blocks → | TELEPAK NETWORKS, INC. - MS | 5278 | BAYSTLOUIS | MS |
| 2003-10-30 | 228-272 | not yet reported which blocks → | TELEPAK NETWORKS, INC. - MS | 5278 | MOSS POINT | MS |
| 2003-10-30 | 240-681 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | BRANDYWINE | MD |
| 2003-10-30 | 334-422 | 0–9 XXXall 10 · 6 holders which blocks → | SOUTHERN COMMUNICATIONS SERVICES, INC. | 6744 | LINDEN | AL |
| 2003-10-30 | 504-910 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - LA | 3232 | NEWORLEANS | LA |
| 2003-10-30 | 513-217 | 0–9 XXXall 10 · 3 holders which blocks → | CINCINNATI BELL EXTENDED TERRITORIES LLC - OH | 309B | MIDDLETOWN | OH |
| 2003-10-30 | 513-360 | 0–9 XXXall 10 · 8 holders which blocks → | CINCINNATI BELL EXTENDED TERRITORIES LLC - OH | 309B | MONROE | OH |
| 2003-10-30 | 541-526 | 0–9 XXXall 10 · 5 holders which blocks → | QWEST CORPORATION | 9638 | REDMOND | OR |
| 2003-10-30 | 574-309 | 0–9 XXXall 10 · 2 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN | 7440 | SOUTH BEND | IN |
| 2003-10-30 | 662-718 | not yet reported which blocks → | TEC OF JACKSON, INC. - MS | 3704 | TUPELO | MS |
| 2003-10-30 | 765-373 | 0XXX1XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN | 7440 | RICHMOND | IN |
| 2003-10-30 | 775-763 | 0XXX1XXX3XXX4XXX7XXX8XXX · 6 holders which blocks → | CENTURYTEL GEM STATE INC-NV DBA CENTURYLINK - NV | 4438 | MOUNTAINCY | NV |
| 2003-10-30 | 812-514 | 0–9 XXXall 10 · 5 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN | 7440 | TERREHAUTE | IN |
| 2003-10-30 | 985-258 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | LAROSE | LA |
| 2003-10-29 | 250-819 | not yet reported which blocks → | TELUS Mobility | 8301 | South Kamloops | — |
| 2003-10-29 | 306-564 | not yet reported which blocks → | SaskTel | 8091 | Regina | — |
| 2003-10-29 | 403-968 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| 2003-10-29 | 418-293 | not yet reported which blocks → | TELUS Quebec | 8083 | Baie-Comeau (Hauterive) | — |
| 2003-10-29 | 607-206 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | BINGHAMTON | NY |
| 2003-10-28 | 316-201 | 0–9 XXXall 10 · 6 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - KS | 7593 | WICHITA | KS |
| 2003-10-28 | 414-455 | 0–9 XXXall 10 · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MILWAUKZN1 | WI |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.