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
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2015-07-01 | 254-268 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | CROSS PL | TX |
| 2015-07-01 | 254-269 | 0–9 XXXall 10 · 7 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | GLEN ROSE | TX |
| 2015-07-01 | 254-637 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW | 1163 | MOUNT CALM | TX |
| 2015-07-01 | 254-988 | 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | ROSEBUD | TX |
| 2015-07-01 | 409-219 | 0–9 XXXall 10 · 2 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | PINELAND | TX |
| 2015-07-01 | 409-222 | 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | TEXAS WINDSTREAM, LLC | 2153 | WINNIE | TX |
| 2015-07-01 | 409-226 | 0–9 XXXall 10 · 5 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | FAIRMOUNT | TX |
| 2015-07-01 | 409-228 | 0–9 XXXall 10 · 4 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | HEMPHILL | TX |
| 2015-07-01 | 409-230 | 0–9 XXXall 10 · 4 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | COLMESNEIL | TX |
| 2015-07-01 | 409-404 | 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 5 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | MILAM | TX |
| 2015-07-01 | 475-419 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | STAMFORD | CT |
| 2015-07-01 | 515-878 | 0–9 XXXwhole prefix which blocks → | QWEST CORPORATION | 9631 | DES MOINES | IA |
| 2015-07-01 | 657-275 | 0–9 XXXall 10 · 7 holders which blocks → | T-MOBILE USA, INC. | 6529 | PLACENTIA | CA |
| 2015-07-01 | 682-243 | 0–9 XXXall 10 · 2 holders which blocks → | TEXAS WINDSTREAM, LLC | 2153 | ACTON | TX |
| 2015-07-01 | 737-226 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | AUSTIN | TX |
| 2015-07-01 | 806-461 | 9XXX which blocks → | VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW | 1163 | CLARENDON | TX |
| 2015-07-01 | 806-482 | 0XXX1XXX2XXX4XXX6XXX9XXX · 3 holders which blocks → | VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW | 1163 | SHALLOWTR | TX |
| 2015-07-01 | 806-483 | 4XXX9XXX · 2 holders which blocks → | VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW | 1163 | POST | TX |
| 2015-07-01 | 828-722 | 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 8 holders which blocks → | WINDSTREAM NORTH CAROLINA, INC. | 0476 | COLUMBUS | NC |
| 2015-07-01 | 828-739 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | WINDSTREAM NORTH CAROLINA, INC. | 0476 | GREENCREEK | NC |
| 2015-07-01 | 857-275 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2015-07-01 | 857-278 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2015-07-01 | 912-549 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - GA | 983E | CLAXTON | GA |
| 2015-07-01 | 915-223 | 0–9 XXXall 10 · 2 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | FABENS | TX |
| 2015-07-01 | 936-220 | 0–9 XXXall 10 · 6 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | BEDIAS | TX |
| 2015-07-01 | 936-226 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | NORMANGEE | TX |
| 2015-07-01 | 936-227 | 0–9 XXXall 10 · 8 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | CUSHING | TX |
| 2015-07-01 | 936-237 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | HUNTINGTON | TX |
| 2015-07-01 | 936-246 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | JOAQUIN | TX |
| 2015-07-01 | 936-356 | 0–9 XXXall 10 · 7 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | TENAHA | TX |
| 2015-07-01 | 936-410 | 1XXX4XXX6XXX9XXX · 3 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | ZAVALLA | TX |
| 2015-07-01 | 971-280 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 5820 | PORTLAND | OR |
| 2015-07-01 | 980-435 | 0–9 XXXall 10 · 6 holders which blocks → | WINDSTREAM NORTH CAROLINA, INC. | 0476 | MOORESVL | NC |
| 2015-06-30 | 226-812 | not yet reported which blocks → | Distributel | 082E | Kitchener-Waterloo | — |
| 2015-06-30 | 226-813 | not yet reported which blocks → | Distributel | 082E | London | — |
| 2015-06-30 | 501-254 | 0–9 XXXall 10 · 6 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SEARCY | AR |
| 2015-06-30 | 651-363 | 0–9 XXXall 10 · 3 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | TWINCITIES | MN |
| 2015-06-30 | 681-477 | 0XXX1XXX2XXX4XXX5XXX7XXX · 4 holders which blocks → | CSC VOICE, LLC | 612K | FLEMINGTON | WV |
| 2015-06-30 | 681-525 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → | CSC VOICE, LLC | 612K | FARMINGTON | WV |
| 2015-06-30 | 720-517 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DENVER | CO |
| 2015-06-30 | 762-252 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - GA | 983E | CAVESPRING | GA |
| 2015-06-30 | 763-283 | 0–9 XXXall 10 · 3 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | TWINCITIES | MN |
| 2015-06-30 | 778-591 | not yet reported which blocks → | TELUS | 8086 | Newton | — |
| 2015-06-30 | 848-267 | 0–9 XXXwhole prefix which blocks → | PAETEC ITEL, LLC | 829J | NEWBRNSWCK | NJ |
| 2015-06-30 | 907-319 | 0XXX3XXX5XXX6XXX7XXX8XXX9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DEADHORSE | AK |
| 2015-06-29 | 208-807 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - ID | 7558 | BOISE | ID |
| 2015-06-29 | 289-870 | not yet reported which blocks → | Distributel | 082E | Richmond Hill | — |
| 2015-06-29 | 579-212 | not yet reported which blocks → | TELUS Quebec | 2243 | Cowansville | — |
| 2015-06-29 | 579-213 | not yet reported which blocks → | TELUS Quebec | 2243 | Granby | — |
| 2015-06-29 | 579-256 | not yet reported which blocks → | TELUS Quebec | 2243 | Bromont | — |
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.