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
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 |
|---|---|---|---|---|---|---|
| 2015-06-02 | 639-560 | not yet reported which blocks → | SaskTel Mobility | 9868 | Regina | — |
| 2015-06-02 | 647-484 | not yet reported which blocks → | Distributel | 082E | Toronto | — |
| 2015-06-02 | 669-218 | 0–9 XXXwhole prefix which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | SNJS WEST | CA |
| 2015-06-02 | 949-557 | 0–9 XXXall 10 · 3 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | IRVINE | CA |
| 2015-06-01 | 202-852 | 0–9 XXXall 10 · 2 holders which blocks → | AIRUS, INC. - DC | 645H | WSHNGTNZN1 | DC |
| 2015-06-01 | 210-350 | 0–9 XXXall 10 · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SANANTONIO | TX |
| 2015-06-01 | 216-356 | 0–9 XXXall 10 · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | CLEVELAND | OH |
| 2015-06-01 | 231-221 | 0–9 XXXall 10 · 5 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | HARBOR SPG | MI |
| 2015-06-01 | 289-714 | not yet reported which blocks → | Distributel | 082E | Burlington | — |
| 2015-06-01 | 312-722 | 0–9 XXXall 10 · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | CHICGOZN01 | IL |
| 2015-06-01 | 346-801 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | BEACH CITY | TX |
| 2015-06-01 | 475-330 | 0–9 XXXall 10 · 5 holders which blocks → | CSC VOICE, LLC | 612K | FAIRFIELD | CT |
| 2015-06-01 | 575-728 | 0–9 XXXall 10 · 5 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | HATCH | NM |
| 2015-06-01 | 720-696 | 0–9 XXXall 10 · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CO | 078F | DENVER | CO |
| 2015-06-01 | 727-318 | 0–9 XXXall 10 · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - FL | 8300 | STPETERSBG | FL |
| 2015-06-01 | 778-567 | not yet reported which blocks → | Comwave Networks | 160G | Williams Lake | — |
| 2015-06-01 | 778-568 | not yet reported which blocks → | Comwave Networks | 160G | Duncan | — |
| 2015-06-01 | 778-569 | not yet reported which blocks → | Comwave Networks | 160G | Whistler | — |
| 2015-06-01 | 778-570 | not yet reported which blocks → | Comwave Networks | 160G | Cranbrook | — |
| 2015-06-01 | 857-407 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | ROXBURY | MA |
| 2015-06-01 | 937-995 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | FAIRBORN | OH |
| 2015-05-29 | 415-914 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNFC CNTRL | CA |
| 2015-05-29 | 507-607 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - MN | 980E | LE SUEUR | MN |
| 2015-05-29 | 570-712 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | MEHOOPANY | PA |
| 2015-05-29 | 623-522 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | PHOENIX | AZ |
| 2015-05-29 | 740-952 | 0–9 XXXall 10 · 7 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | UHRICHSVL | OH |
| 2015-05-29 | 813-682 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | TAMPACEN | FL |
| 2015-05-29 | 856-644 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - NJ | 637C | CAMDEN | NJ |
| 2015-05-29 | 929-385 | 0–9 XXXwhole prefix which blocks → | OMNIPOINT COMMUNICATIONS, INC. - NY | 6622 | NWYRCYZN05 | NY |
| 2015-05-29 | 929-422 | 0–9 XXXall 10 · 2 holders which blocks → | OMNIPOINT COMMUNICATIONS, INC. - NY | 6622 | NWYRCYZN15 | NY |
| 2015-05-28 | 226-341 | not yet reported which blocks → | TELUS Mobility | 8303 | Hespeler | — |
| 2015-05-28 | 289-715 | not yet reported which blocks → | Distributel | 082E | Oakville | — |
| 2015-05-28 | 581-201 | not yet reported which blocks → | Distributel | 083E | Quebec | — |
| 2015-05-28 | 587-822 | not yet reported which blocks → | Distributel | 081E | Lethbridge | — |
| 2015-05-28 | 587-823 | not yet reported which blocks → | Distributel | 081E | Red Deer | — |
| 2015-05-28 | 587-824 | not yet reported which blocks → | Distributel | 081E | Medicine Hat | — |
| 2015-05-28 | 587-979 | not yet reported which blocks → | Comwave Networks | 160G | Leduc | — |
| 2015-05-28 | 587-980 | not yet reported which blocks → | Comwave Networks | 160G | Stony Plain | — |
| 2015-05-28 | 587-981 | not yet reported which blocks → | Comwave Networks | 160G | Vegreville | — |
| 2015-05-28 | 939-529 | 0–9 XXXwhole prefix which blocks → | SUNCOM DBA T-MOBILE USA | 8645 | FAJARDO | PR |
| 2015-05-27 | 202-844 | 0–9 XXXall 10 · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | WSHNGTNZN1 | DC |
| 2015-05-27 | 346-401 | 0–9 XXXwhole prefix which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | HOUSTON | TX |
| 2015-05-27 | 407-845 | 0–9 XXXall 10 · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - FL | 8300 | ORLANDO | FL |
| 2015-05-27 | 484-987 | 0–9 XXXall 10 · 6 holders which blocks → | COMCAST IP PHONE, LLC | 318J | READING | PA |
| 2015-05-27 | 707-979 | 0–9 XXXall 10 · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | MENDOCINO | CA |
| 2015-05-27 | 720-692 | 0–9 XXXall 10 · 2 holders which blocks → | METROPCS, INC. | 5562 | DENVER | CO |
| 2015-05-27 | 929-384 | 0–9 XXXall 10 · 5 holders which blocks → | PEERLESS NETWORK OF NEW YORK, LLC - NY | 155E | NWYRCYZN05 | NY |
| 2015-05-26 | 240-972 | 0–9 XXXall 10 · 4 holders which blocks → | BALTIMORE-WASHINGTON TELEPHONE (BWT) | 8697 | LAUREL238 | MD |
| 2015-05-26 | 407-961 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | WINTERPARK | FL |
| 2015-05-26 | 507-509 | 0–9 XXXall 10 · 7 holders which blocks → | BANDWIDTH.COM CLEC, LLC - MN | 980E | AUSTIN | MN |
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.