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
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May 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2015-10-02 | 734-977 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | SALINE | MI |
| 2015-10-02 | 747-266 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNFN SPLV | CA |
| 2015-10-02 | 747-271 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BRBN SNVY | CA |
| 2015-10-02 | 805-867 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTAMARIA | CA |
| 2015-10-02 | 805-941 | 0–9 XXXall 10 · 4 holders which blocks → | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | VNTRA EAST | CA |
| 2015-10-02 | 980-256 | 0–9 XXXall 10 · 6 holders which blocks → | PEERLESS NETWORK OF NORTH CAROLINA, LLC - NC | 350F | CHARLOTTE | NC |
| 2015-10-01 | 240-763 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - MD | 071F | WSNG238Z15 | MD |
| 2015-10-01 | 313-992 | 0–9 XXXall 10 · 4 holders which blocks → | PEERLESS NETWORK OF MICHIGAN, LLC - MI | 933G | DETROITZN5 | MI |
| 2015-10-01 | 320-406 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN | 5816 | ST CLOUD | MN |
| 2015-10-01 | 501-585 | 0–9 XXXall 10 · 7 holders which blocks → | WINDSTREAM COMMUNICATIONS, INC. - AR | 7656 | CONWAY | AR |
| 2015-10-01 | 619-416 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNDG SNDG | CA |
| 2015-10-01 | 808-825 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HILO | HI |
| 2015-10-01 | 845-420 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | NEWBURGH | NY |
| 2015-10-01 | 949-568 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | IRVINE | CA |
| 2015-09-30 | 206-539 | 0–9 XXXall 10 · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SEATTLE | WA |
| 2015-09-30 | 240-806 | 0–9 XXXall 10 · 5 holders which blocks → | PEERLESS NETWORK OF MARYLAND, LLC | 568G | INDIANHEAD | MD |
| 2015-09-30 | 360-842 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | BREMERTON | WA |
| 2015-09-30 | 435-268 | 0–9 XXXall 10 · 8 holders which blocks → | FIRSTDIGITAL COMMUNICATIONS, LLC | 716D | TOOELE | UT |
| 2015-09-30 | 470-281 | 0–9 XXXall 10 · 5 holders which blocks → | AT&T ENTERPRISES, LLC | 516C | CUMMING | GA |
| 2015-09-30 | 520-636 | 0–9 XXXall 10 · 5 holders which blocks → | PEERLESS NETWORK OF ARIZONA, LLC - AZ | 579F | SAN MANUEL | AZ |
| 2015-09-30 | 586-272 | 0–9 XXXall 10 · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | WARREN | MI |
| 2015-09-30 | 931-317 | 1XXX which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | MONTEAGLE | TN |
| 2015-09-30 | 954-994 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | DEERFLDBCH | FL |
| 2015-09-30 | 980-579 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC | 6324 | CHARLOTTE | NC |
| 2015-09-29 | 438-303 | not yet reported which blocks → | Bell Mobility | 6574 | Montreal | — |
| 2015-09-29 | 438-326 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Ile-Perrot | — |
| 2015-09-29 | 438-327 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Lachine | — |
| 2015-09-29 | 438-328 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Montreal | — |
| 2015-09-29 | 438-329 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Pointe-Claire | — |
| 2015-09-29 | 438-330 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Roxboro | — |
| 2015-09-29 | 438-331 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Ste-Genevieve | — |
| 2015-09-29 | 506-377 | not yet reported which blocks → | Bell Mobility Aliant | 329A | Moncton | — |
| 2015-09-29 | 647-324 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2015-09-29 | 702-963 | 0–9 XXXall 10 · 5 holders which blocks → | PEERLESS NETWORK OF NEVADA, LLC - NV | 408F | LAS VEGAS | NV |
| 2015-09-29 | 702-969 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | MESQUITE | NV |
| 2015-09-29 | 774-534 | 0–9 XXXall 10 · 6 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | BARNSTABLE | MA |
| 2015-09-29 | 775-504 | 0–9 XXXall 10 · 5 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | OWYHEE | NV |
| 2015-09-29 | 778-556 | not yet reported which blocks → | Bell Mobility | 6574 | Aldergrove | — |
| 2015-09-29 | 873-339 | not yet reported which blocks → | Bell Mobility | 6574 | Sherbrooke | — |
| 2015-09-29 | 931-301 | 1XXX which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | LAAGER | TN |
| 2015-09-29 | 947-222 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLCV - MI | 543C | DRAYTON PL | MI |
| 2015-09-29 | 947-333 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLCV - MI | 543C | LAKE ORION | MI |
| 2015-09-29 | 947-800 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLCV - MI | 543C | COMMERCE | MI |
| 2015-09-29 | 947-999 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLCV - MI | 543C | PONTIAC | MI |
| 2015-09-29 | 971-930 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 5820 | PORTLAND | OR |
| 2015-09-28 | 208-810 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | BOISE | ID |
| 2015-09-28 | 226-916 | not yet reported which blocks → | Iristel Inc. | 154E | Orangeville | — |
| 2015-09-28 | 249-359 | not yet reported which blocks → | TELUS Mobility | 8303 | Barrie | — |
| 2015-09-28 | 313-765 | 0–9 XXXall 10 · 4 holders which blocks → | PEERLESS NETWORK OF MICHIGAN, LLC - MI | 933G | DETROITZN6 | MI |
| 2015-09-28 | 346-308 | 0–9 XXXall 10 · 5 holders which blocks → | PEERLESS NETWORK OF TEXAS, LLC - TX | 177F | HOUSTON | TX |
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.