NumberResearchRecent thousands-block assignments
9 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, last 30 days — NPA 928
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 | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2014-02-18 | 928-764-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | CASTLEROCK | AZ |
| 2014-02-14 | 928-293-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | KINGMAN | AZ |
| 2014-02-11 | 928-299-2XXX | 2000–2999 | Assigned | CSC VOICE, LLC | 612K | BULLHEADCY | AZ |
| 2014-02-11 | 928-299-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | BULLHEADCY | AZ |
| 2014-02-11 | 928-299-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | BULLHEADCY | AZ |
| 2014-02-11 | 928-299-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | BULLHEADCY | AZ |
| 2014-02-11 | 928-529-2XXX | 2000–2999 | Assigned | CSC VOICE, LLC | 612K | KINGMAN | AZ |
| 2014-02-11 | 928-529-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | KINGMAN | AZ |
| 2014-02-11 | 928-529-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | KINGMAN | AZ |
| 2014-02-11 | 928-529-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | KINGMAN | AZ |
| 2014-02-04 | 928-363-1XXX | 1000–1999 | Assigned | CSC VOICE, LLC | 612K | PAYSON | AZ |
| 2014-02-04 | 928-363-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | PAYSON | AZ |
| 2014-02-04 | 928-404-2XXX | 2000–2999 | Assigned | CSC VOICE, LLC | 612K | BULLHDCYN | AZ |
| 2014-02-04 | 928-404-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | BULLHDCYN | AZ |
| 2014-02-04 | 928-577-2XXX | 2000–2999 | Assigned | CSC VOICE, LLC | 612K | MOHAVE VLY | AZ |
| 2014-02-04 | 928-764-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | CASTLEROCK | AZ |
| 2014-02-04 | 928-862-2XXX | 2000–2999 | Assigned | CSC VOICE, LLC | 612K | SEDONA | AZ |
| 2014-02-04 | 928-862-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | SEDONA | AZ |
| 2014-02-04 | 928-862-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | SEDONA | AZ |
| 2014-01-29 | 928-259-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | YUMA | AZ |
| 2014-01-29 | 928-862-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | SEDONA | AZ |
| 2014-01-22 | 928-278-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | BULLHEADCY | AZ |
| 2014-01-13 | 928-857-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - AZ | 587F | CIBOLA | AZ |
| 2013-12-23 | 928-379-8XXX | 8000–8999 | Assigned | LEVEL 3 TELECOM OF ARIZONA, LLC - AZ | 7552 | PRESCOTT | AZ |
| 2013-11-22 | 928-427-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WICKENBURG | AZ |
| 2013-11-08 | 928-233-6XXX | 6000–6999 | Assigned | ONVOY, LLC - AZ | 630E | FLAGSTAFF | AZ |
| 2013-11-08 | 928-233-7XXX | 7000–7999 | Assigned | ONVOY, LLC - AZ | 630E | FLAGSTAFF | AZ |
| 2013-11-08 | 928-599-2XXX | 2000–2999 | Assigned | ONVOY, LLC - AZ | 630E | GRANDCNYON | AZ |
| 2013-11-08 | 928-599-3XXX | 3000–3999 | Assigned | ONVOY, LLC - AZ | 630E | GRANDCNYON | AZ |
| 2013-11-08 | 928-910-7XXX | 7000–7999 | Assigned | ONVOY, LLC - AZ | 630E | PRESCOTT | AZ |
| 2013-11-08 | 928-910-8XXX | 8000–8999 | Assigned | ONVOY, LLC - AZ | 630E | PRESCOTT | AZ |
| 2013-11-08 | 928-963-3XXX | 3000–3999 | Assigned | ONVOY, LLC - AZ | 630E | SEDONA | AZ |
| 2013-11-08 | 928-963-7XXX | 7000–7999 | Assigned | ONVOY, LLC - AZ | 630E | SEDONA | AZ |
| 2013-11-07 | 928-278-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | BULLHEADCY | AZ |
| 2013-11-07 | 928-723-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | YUMA | AZ |
| 2013-11-06 | 928-440-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | FLAGSTAFF | AZ |
| 2013-11-06 | 928-440-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | FLAGSTAFF | AZ |
| 2013-11-06 | 928-440-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | FLAGSTAFF | AZ |
| 2013-11-06 | 928-733-1XXX | 1000–1999 | Assigned | CSC VOICE, LLC | 612K | LKHAVASUCY | AZ |
| 2013-11-06 | 928-733-2XXX | 2000–2999 | Assigned | CSC VOICE, LLC | 612K | LKHAVASUCY | AZ |
| 2013-11-06 | 928-733-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | LKHAVASUCY | AZ |
| 2013-11-06 | 928-733-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | LKHAVASUCY | AZ |
| 2013-11-06 | 928-733-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | LKHAVASUCY | AZ |
| 2013-11-06 | 928-733-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | LKHAVASUCY | AZ |
| 2013-10-18 | 928-220-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FLAGSTAFF | AZ |
| 2013-10-15 | 928-457-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF ARIZONA, LLC - AZ | 579F | SNOWFLAKE | AZ |
| 2013-10-15 | 928-466-8XXX | 8000–8999 | Assigned | PEERLESS NETWORK OF ARIZONA, LLC - AZ | 579F | CASTLEROCK | AZ |
| 2013-10-15 | 928-667-8XXX | 8000–8999 | Assigned | PEERLESS NETWORK OF ARIZONA, LLC - AZ | 579F | PARKER DAM | AZ |
| 2013-10-15 | 928-765-8XXX | 8000–8999 | Assigned | PEERLESS NETWORK OF ARIZONA, LLC - AZ | 579F | WIKIEUP | AZ |
| 2013-10-11 | 928-457-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | SNOWFLAKE | AZ |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.