NumberResearchRecent prefix assignments
360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026
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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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2012-04-09 | 412-863 | 0–9 XXXall 10 · 5 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | PTTSBGZON1 | PA |
| 2012-04-09 | 502-208 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - KY | 987E | LOUISVILLE | KY |
| 2012-04-09 | 502-812 | 0–9 XXXall 10 · 3 holders which blocks → | POWERTEL KENTUCKY LICENSES, INC. | 365C | LOUISVILLE | KY |
| 2012-04-09 | 505-943 | 0XXX4XXX · 2 holders which blocks → | NAVAJO COMM CO INC NM DBA NAVAJO COMM CO NM | 4450 | SHIPROCK | NM |
| 2012-04-09 | 516-218 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NY | 997E | NASSAUZN03 | NY |
| 2012-04-09 | 646-627 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | NWYRCYZN01 | NY |
| 2012-04-09 | 917-891 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | NWYRCYZN03 | NY |
| 2012-04-06 | 407-867 | 0–9 XXXall 10 · 4 holders which blocks → | TERRA NOVA TELECOM, INC. - FL | 382G | ORLANDO | FL |
| 2012-04-06 | 412-639 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PTTSBGZON1 | PA |
| 2012-04-06 | 518-530 | 0–9 XXXall 10 · 4 holders which blocks → | THE VOICE APPLICATION NETWORK, LLC | 507J | ALBANY | NY |
| 2012-04-06 | 571-428 | 0–9 XXXall 10 · 6 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | MANASSAS | VA |
| 2012-04-06 | 602-303 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ |
| 2012-04-06 | 754-600 | 0–9 XXXall 10 · 7 holders which blocks → | TERRA NOVA TELECOM, INC. - FL | 382G | DEERFLDBCH | FL |
| 2012-04-06 | 804-625 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | RICHMOND | VA |
| 2012-04-06 | 859-447 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY | 6500 | LEXINGTON | KY |
| 2012-04-06 | 917-732 | 0–9 XXXall 10 · 5 holders which blocks → | TELENGY L.L.C. - NY | 473G | NWYRCYZN09 | NY |
| 2012-04-05 | 226-581 | not yet reported which blocks → | TELUS Mobility | 8303 | Kitchener-Waterloo | — |
| 2012-04-05 | 226-582 | not yet reported which blocks → | TELUS Mobility | 8303 | London | — |
| 2012-04-05 | 226-583 | not yet reported which blocks → | TELUS Mobility | 8303 | Brantford | — |
| 2012-04-05 | 226-584 | not yet reported which blocks → | TELUS Mobility | 8303 | Stratford | — |
| 2012-04-05 | 240-613 | 0–9 XXXwhole prefix which blocks → | PAETEC ITEL, LLC | 829J | WSHNGTNZN4 | MD |
| 2012-04-05 | 249-357 | not yet reported which blocks → | TELUS Mobility | 8303 | Peterborough | — |
| 2012-04-05 | 289-672 | not yet reported which blocks → | Iristel Inc. | 154E | Niagara-On-The-Lake | — |
| 2012-04-05 | 289-946 | not yet reported which blocks → | Videotron Ltd. | 787G | Brampton | — |
| 2012-04-05 | 289-947 | not yet reported which blocks → | Videotron Ltd. | 787G | Richmond Hill | — |
| 2012-04-05 | 314-942 | 0–9 XXXall 10 · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | LADUE | MO |
| 2012-04-05 | 331-212 | 0–9 XXXall 10 · 6 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 7196 | AURORA | IL |
| 2012-04-05 | 443-301 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | BALTIMORE | MD |
| 2012-04-05 | 512-654 | 0–9 XXXwhole prefix which blocks → | SOUTHWESTERN BELL | 9533 | AUSTIN | TX |
| 2012-04-05 | 512-655 | 0–9 XXXall 10 · 4 holders which blocks → | SOUTHWESTERN BELL | 9533 | AUSTIN | TX |
| 2012-04-05 | 581-705 | not yet reported which blocks → | Iristel Inc. | 154E | Quebec | — |
| 2012-04-05 | 581-742 | not yet reported which blocks → | Videotron Ltd. | 8306 | Quebec | — |
| 2012-04-05 | 587-445 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| 2012-04-05 | 587-446 | not yet reported which blocks → | TELUS Mobility | 8301 | Edmonton | — |
| 2012-04-05 | 587-447 | not yet reported which blocks → | TELUS Mobility | 8301 | Red Deer | — |
| 2012-04-05 | 708-300 | 0–9 XXXall 10 · 6 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 7196 | CHICAGOHTS | IL |
| 2012-04-05 | 757-550 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - VA | 8825 | NRFOLKZON1 | VA |
| 2012-04-05 | 778-404 | not yet reported which blocks → | Iristel Inc. | 154E | Victoria | — |
| 2012-04-05 | 778-583 | not yet reported which blocks → | TELUS Mobility | 8301 | Kelowna | — |
| 2012-04-05 | 778-584 | not yet reported which blocks → | TELUS Mobility | 8301 | Victoria | — |
| 2012-04-05 | 804-495 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - VA | 8825 | RICHMOND | VA |
| 2012-04-04 | 210-517 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | SANANTONIO | TX |
| 2012-04-04 | 260-498 | 0–9 XXXall 10 · 5 holders which blocks → | COMMUNITY FIBER SOLUTIONS, INC. - IN | 494G | FORT WAYNE | IN |
| 2012-04-04 | 438-264 | not yet reported which blocks → | Zayo Canada Inc. | 8304 | Lachine | — |
| 2012-04-04 | 438-797 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2012-04-04 | 438-798 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2012-04-04 | 438-799 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2012-04-04 | 450-352 | not yet reported which blocks → | 9164-3122 Quebec inc | 843D | Sorel | — |
| 2012-04-04 | 587-320 | not yet reported which blocks → | Iristel Inc. | 154E | Calgary | — |
| 2012-04-04 | 615-864 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | NASHVILLE | TN |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.