NumberResearchRecent thousands-block assignments
38 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 970
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 |
|---|---|---|---|---|---|---|---|
| 2015-05-20 | 970-400-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CO | 078F | GREELEY | CO |
| 2015-05-20 | 970-400-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CO | 078F | GREELEY | CO |
| 2015-05-20 | 970-613-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LOVELAND | CO |
| 2015-05-20 | 970-676-5XXX | 5000–5999 | Assigned | FASTTRACK COMMUNICATIONS, INC. - CO | 330B | DOLORES | CO |
| 2015-05-08 | 970-761-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | 6567 | STEAMBOSPG | CO |
| 2015-05-05 | 970-601-2XXX | 2000–2999 | Assigned | LEVEL 3 TELECOM OF COLORADO, LLC - CO | 4574 | MEAD | CO |
| 2015-04-27 | 970-369-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CO | 078F | TELLURIDE | CO |
| 2015-04-27 | 970-445-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CO | 078F | VAIL | CO |
| 2015-04-27 | 970-458-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CO | 078F | STERLING | CO |
| 2015-04-27 | 970-919-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CO | 078F | SILVERTON | CO |
| 2015-04-23 | 970-316-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CO | 078F | RIDGWAY | CO |
| 2015-04-23 | 970-340-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CO | 078F | CARBONDALE | CO |
| 2015-04-23 | 970-363-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CO | 078F | FRASER | CO |
| 2015-04-23 | 970-394-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DOLORES | CO |
| 2015-04-23 | 970-579-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CO | 078F | DE BEQUE | CO |
| 2015-04-23 | 970-633-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CO | 078F | OURAY | CO |
| 2015-04-22 | 970-278-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | LOVELAND | CO |
| 2015-04-21 | 970-408-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | JOHNSTMLKN | CO |
| 2015-04-21 | 970-570-4XXX | 4000–4999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | CORTEZ | CO |
| 2015-04-21 | 970-699-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | LOVELAND | CO |
| 2015-04-21 | 970-702-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | GREELEY | CO |
| 2015-04-21 | 970-825-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | FT COLLINS | CO |
| 2015-04-21 | 970-833-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | WINDSOR | CO |
| 2015-04-21 | 970-880-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DURANGO | CO |
| 2015-04-20 | 970-470-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | VAIL | CO |
| 2015-04-20 | 970-485-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DILLON | CO |
| 2015-04-20 | 970-615-8XXX | 8000–8999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | MONTROSE | CO |
| 2015-04-20 | 970-710-8XXX | 8000–8999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | ASPEN | CO |
| 2015-04-20 | 970-822-4XXX | 4000–4999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | GRAND JCT | CO |
| 2015-04-20 | 970-989-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | GLENWD SPG | CO |
| 2015-04-07 | 970-400-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CO | 026D | GREELEY | CO |
| 2015-04-02 | 970-275-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | 6567 | MONTROSE | CO |
| 2015-04-02 | 970-699-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LOVELAND | CO |
| 2015-04-01 | 970-426-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | DURANGO | CO |
| 2015-04-01 | 970-779-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | DURANGO | CO |
| 2015-03-30 | 970-821-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CO | 026D | FT COLLINS | CO |
| 2015-03-24 | 970-833-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | WINDSOR | CO |
| 2015-03-18 | 970-875-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | STEAMBOSPG | CO |
| 2015-03-17 | 970-400-2XXX | 2000–2999 | Assigned | QWEST CORPORATION | 9636 | GREELEY | CO |
| 2015-03-17 | 970-400-3XXX | 3000–3999 | Assigned | QWEST CORPORATION | 9636 | GREELEY | CO |
| 2015-03-17 | 970-400-4XXX | 4000–4999 | Assigned | QWEST CORPORATION | 9636 | GREELEY | CO |
| 2015-03-17 | 970-400-5XXX | 5000–5999 | Assigned | QWEST CORPORATION | 9636 | GREELEY | CO |
| 2015-03-17 | 970-400-6XXX | 6000–6999 | Assigned | QWEST CORPORATION | 9636 | GREELEY | CO |
| 2015-03-11 | 970-820-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | LOVELAND | CO |
| 2015-03-05 | 970-779-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | DURANGO | CO |
| 2015-02-17 | 970-536-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | NEW CASTLE | CO |
| 2015-02-11 | 970-489-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | SOCHEYENNE | CO |
| 2015-02-11 | 970-499-4XXX | 4000–4999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | SO LARAMIE | CO |
| 2015-02-10 | 970-665-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CO | 6118 | RIFLE | CO |
| 2015-02-06 | 970-702-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | 6567 | GREELEY | CO |
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.