NumberResearchRecent prefix assignments
341 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
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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 |
|---|---|---|---|---|---|---|
| 2015-05-05 | 914-770 | 0–9 XXXall 10 · 3 holders which blocks → | AIRUS, INC. - NY | 363H | WSCHSTZN01 | NY |
| 2015-05-05 | 916-738 | 0–9 XXXall 10 · 4 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | SCRM MAIN | CA |
| 2015-05-05 | 916-841 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | SCRM MAIN | CA |
| 2015-05-04 | 209-486 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | MODESTO | CA |
| 2015-05-04 | 361-415 | 0–9 XXXall 10 · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | ALICE | TX |
| 2015-05-04 | 619-748 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | CHULAVISTA | CA |
| 2015-05-04 | 657-273 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS NETWORKS, LLC | 899D | SANTA ANA | CA |
| 2015-05-04 | 762-348 | 0–9 XXXall 10 · 6 holders which blocks → | WINDSTREAM GEORGIA COMMUNICATIONS CORP. | 4332 | TOCCOA | GA |
| 2015-05-04 | 774-480 | 0–9 XXXall 10 · 6 holders which blocks → | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BROCKTON | MA |
| 2015-05-04 | 805-635 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | PASOROBLES | CA |
| 2015-05-04 | 848-237 | 0–9 XXXall 10 · 3 holders which blocks → | OMNIPOINT COMMUNICATIONS, INC. - NJ | 6623 | NEWBRNSWCK | NJ |
| 2015-05-02 | 402-800 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | OMAHA | NE |
| 2015-05-02 | 518-517 | 0–9 XXXall 10 · 8 holders which blocks → | SEAMLESS GEOPORT COMM DBA MIDDLEBURGH TELEPHONE LD | 506H | COBLESKILL | NY |
| 2015-05-01 | 204-909 | not yet reported which blocks → | Comwave Networks | 160G | Selkirk | — |
| 2015-05-01 | 204-912 | not yet reported which blocks → | Comwave Networks | 160G | Steinbach | — |
| 2015-05-01 | 229-235 | 0–9 XXXall 10 · 3 holders which blocks → | MCC TELEPHONY LLC | 593K | QUITMAN | GA |
| 2015-05-01 | 229-335 | 0–9 XXXall 10 · 6 holders which blocks → | MCC TELEPHONY LLC | 593K | NASHVILLE | GA |
| 2015-05-01 | 229-383 | 4XXX5XXX8XXX9XXX · 3 holders which blocks → | MCC TELEPHONY LLC | 593K | DONALSONVL | GA |
| 2015-05-01 | 229-404 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → | MCC TELEPHONY LLC | 593K | OCILLA | GA |
| 2015-05-01 | 229-419 | none assigned yet which blocks → | MCC TELEPHONY LLC | 593K | LENOX | GA |
| 2015-05-01 | 229-422 | 1XXX2XXX3XXX4XXX5XXX · 3 holders which blocks → | MCC TELEPHONY LLC | 593K | RAY CITY | GA |
| 2015-05-01 | 229-452 | 0XXX2XXX3XXX4XXX5XXX6XXX · 2 holders which blocks → | MCC TELEPHONY LLC | 593K | LAKELAND | GA |
| 2015-05-01 | 229-484 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | MCC TELEPHONY LLC | 593K | ASHBURN | GA |
| 2015-05-01 | 229-530 | 0XXX1XXX2XXX3XXX4XXX5XXX · 4 holders which blocks → | MCC TELEPHONY LLC | 593K | NORMANPARK | GA |
| 2015-05-01 | 229-577 | 7XXX which blocks → | MCC TELEPHONY LLC | 593K | OMEGA | GA |
| 2015-05-01 | 415-910 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | BELVEDERE | CA |
| 2015-05-01 | 417-368 | 4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | MCC TELEPHONY LLC | 593K | SPRINGFLD | MO |
| 2015-05-01 | 435-222 | 0–9 XXXall 10 · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - UT | 117F | HEBER CITY | UT |
| 2015-05-01 | 510-640 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | ELSBR-PINL | CA |
| 2015-05-01 | 541-581 | 0–9 XXXall 10 · 7 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OR | 076F | LOWELL | OR |
| 2015-05-01 | 909-686 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | MENTONE | CA |
| 2015-05-01 | 912-474 | 2XXX3XXX4XXX6XXX7XXX · 3 holders which blocks → | MCC TELEPHONY LLC | 593K | WILLACOCHE | GA |
| 2015-04-30 | 205-725 | 0–9 XXXall 10 · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - AL | 8271 | BIRMINGHAM | AL |
| 2015-04-30 | 229-258 | 0–9 XXXall 10 · 2 holders which blocks → | MCC TELEPHONY LLC | 593K | MEIGS | GA |
| 2015-04-30 | 229-306 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | MCC TELEPHONY LLC | 593K | ELLAVILLE | GA |
| 2015-04-30 | 229-340 | 0–9 XXXall 10 · 4 holders which blocks → | MCC TELEPHONY LLC | 593K | CUTHBERT | GA |
| 2015-04-30 | 229-635 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | MCC TELEPHONY LLC | 593K | FITZGERALD | GA |
| 2015-04-30 | 229-689 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | MCC TELEPHONY LLC | 593K | DAWSON | GA |
| 2015-04-30 | 229-855 | 5XXX8XXX · 2 holders which blocks → | MCC TELEPHONY LLC | 593K | SHELLMAN | GA |
| 2015-04-30 | 320-849 | 0XXX1XXX3XXX7XXX8XXX · 4 holders which blocks → | FEDERATED TELEPHONE COOPERATIVE - MN | 2629 | ORTONVILLE | MN |
| 2015-04-30 | 579-631 | not yet reported which blocks → | Videotron Ltd. | 8306 | Pont-Viau | — |
| 2015-04-30 | 682-319 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GLENDALE | TX |
| 2015-04-30 | 779-901 | 0–9 XXXall 10 · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - IL | 984E | MARENGO | IL |
| 2015-04-30 | 863-240 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - FL | 982E | HAINESCITY | FL |
| 2015-04-30 | 902-936 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Bridgewater | — |
| 2015-04-30 | 902-937 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Chester | — |
| 2015-04-30 | 902-938 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Kentville | — |
| 2015-04-30 | 904-559 | 0–9 XXXall 10 · 7 holders which blocks → | COMCAST IP PHONE, LLC | 318J | JACKSONVL | FL |
| 2015-04-30 | 912-374 | 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | MCC TELEPHONY LLC | 593K | PEARSON | GA |
| 2015-04-30 | 920-310 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - WI | 007F | KEWAUNEE | WI |
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.