NumberResearchRecent thousands-block assignments
21 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 307
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 |
|---|---|---|---|---|---|---|---|
| 2012-07-19 | 307-312-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - WY | 081F | WSPEARFISH | WY |
| 2012-07-05 | 307-343-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | LARAMIE | WY |
| 2012-06-22 | 307-312-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - WY | 081F | WSPEARFISH | WY |
| 2012-06-13 | 307-203-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | JACKSON | WY |
| 2012-06-07 | 307-514-6XXX | 6000–6999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CHEYENNE | WY |
| 2012-06-05 | 307-274-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - WY | 081F | CHEYENNE | WY |
| 2012-05-14 | 307-797-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | CASPER | WY |
| 2012-05-07 | 307-201-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - WY | 081F | JACKSON | WY |
| 2012-05-02 | 307-417-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | RAWLINS | WY |
| 2012-05-02 | 307-431-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | WORLAND | WY |
| 2012-05-02 | 307-466-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GREENRIVER | WY |
| 2012-05-02 | 307-624-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DOUGLAS | WY |
| 2012-04-30 | 307-216-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - WY | 081F | LUSK | WY |
| 2012-04-10 | 307-337-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | CASPER | WY |
| 2012-03-19 | 307-337-3XXX | 3000–3999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CASPER | WY |
| 2012-02-29 | 307-828-5XXX | 5000–5999 | Assigned | ONVOY, LLC - WY | 450F | KEMMERER | WY |
| 2012-02-27 | 307-448-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | ROCK SPG | WY |
| 2012-02-07 | 307-363-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | GILLETTE | WY |
| 2012-02-07 | 307-514-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CHEYENNE | WY |
| 2012-01-30 | 307-278-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | BUFFALO | WY |
| 2012-01-30 | 307-877-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | KEMMERER | WY |
| 2012-01-13 | 307-462-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | CASPER | WY |
| 2012-01-13 | 307-683-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | SHERIDAN | WY |
| 2012-01-10 | 307-344-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - WY | 081F | MAMMOTH | WY |
| 2012-01-03 | 307-269-7XXX | 7000–7999 | Assigned | ONVOY, LLC - WY | 450F | WHEATLAND | WY |
| 2012-01-03 | 307-359-7XXX | 7000–7999 | Assigned | ONVOY, LLC - WY | 450F | DOUGLAS | WY |
| 2012-01-03 | 307-438-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WY | 450F | LANDER | WY |
| 2012-01-03 | 307-466-7XXX | 7000–7999 | Assigned | ONVOY, LLC - WY | 450F | GREENRIVER | WY |
| 2012-01-03 | 307-481-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WY | 450F | LUSK | WY |
| 2012-01-03 | 307-543-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WY | 450F | MORAN | WY |
| 2012-01-03 | 307-554-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WY | 450F | GLENROCK | WY |
| 2012-01-03 | 307-620-7XXX | 7000–7999 | Assigned | ONVOY, LLC - WY | 450F | BUFFALO | WY |
| 2012-01-03 | 307-677-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WY | 450F | EVANSTON | WY |
| 2012-01-03 | 307-699-6XXX | 6000–6999 | Assigned | ONVOY, LLC - WY | 450F | JACKSON | WY |
| 2012-01-03 | 307-735-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WY | 450F | GLENDO | WY |
| 2011-12-28 | 307-543-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - WY | 081F | MORAN | WY |
| 2011-12-16 | 307-248-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - WY | 081F | AFTON | WY |
| 2011-12-01 | 307-298-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | DOUGLAS | WY |
| 2011-12-01 | 307-313-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | EVANSTON | WY |
| 2011-11-28 | 307-735-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - WY | 081F | GLENDO | WY |
| 2011-11-03 | 307-271-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | POWELL | WY |
| 2011-11-03 | 307-337-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CASPER | WY |
| 2011-10-27 | 307-545-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - WY | 081F | OLDFATHFUL | WY |
| 2011-09-20 | 307-369-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CHEYENNE | WY |
| 2011-08-22 | 307-274-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - WY | 081F | CHEYENNE | WY |
| 2011-08-10 | 307-359-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | DOUGLAS | WY |
| 2011-07-29 | 307-269-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WHEATLAND | WY |
| 2011-07-18 | 307-337-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CASPER | WY |
| 2011-07-11 | 307-578-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | CODY | WY |
| 2011-07-06 | 307-365-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CHEYENNE | WY |
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.