NumberResearchRecent thousands-block assignments
17 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 443
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 |
|---|---|---|---|---|---|---|---|
| 2015-04-14 | 443-679-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | SEVERN | MD |
| 2015-04-14 | 443-873-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | BALTIMORE | MD |
| 2015-04-14 | 443-885-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | BALTIMORE | MD |
| 2015-04-14 | 443-917-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | COLUMBIA | MD |
| 2015-04-14 | 443-917-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | COLUMBIA | MD |
| 2015-04-14 | 443-961-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | BALTIMORE | MD |
| 2015-04-14 | 443-961-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | BALTIMORE | MD |
| 2015-04-14 | 443-961-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | BALTIMORE | MD |
| 2015-04-14 | 443-961-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | BALTIMORE | MD |
| 2015-04-14 | 443-961-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | BALTIMORE | MD |
| 2015-04-14 | 443-961-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | BALTIMORE | MD |
| 2015-04-09 | 443-419-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | GLENWOOD | MD |
| 2015-04-09 | 443-432-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | PRINCEFRCK | MD |
| 2015-04-03 | 443-247-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | UNION BDG | MD |
| 2015-04-03 | 443-405-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | RANDALLSTN | MD |
| 2015-04-02 | 443-991-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | TOWSON | MD |
| 2015-04-01 | 443-588-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | PARKVILLE | MD |
| 2015-03-31 | 443-353-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | COCKEYSVL | MD |
| 2015-03-27 | 443-601-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | FALLSTON | MD |
| 2015-03-24 | 443-445-1XXX | 1000–1999 | Assigned | PEERLESS NETWORK OF MARYLAND, LLC | 568G | ELKRIDGE | MD |
| 2015-03-24 | 443-645-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | MILLERSVL | MD |
| 2015-03-17 | 443-515-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | CAMBRIDGE | MD |
| 2015-03-17 | 443-515-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | CAMBRIDGE | MD |
| 2015-03-17 | 443-648-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | ESSEX | MD |
| 2015-03-17 | 443-941-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS ENTERPRISES, LP | 6626 | ELKTON | MD |
| 2015-03-10 | 443-885-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | BALTIMORE | MD |
| 2015-03-10 | 443-961-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | BALTIMORE | MD |
| 2015-03-09 | 443-313-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | FORK | MD |
| 2015-03-09 | 443-639-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | HAMPSTEAD | MD |
| 2015-02-24 | 443-448-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | DENTON | MD |
| 2015-02-23 | 443-230-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | ODENTON | MD |
| 2015-02-23 | 443-272-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | RANDALLSTN | MD |
| 2015-02-23 | 443-294-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | WEST RIVER | MD |
| 2015-02-23 | 443-432-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | PRINCEFRCK | MD |
| 2015-02-23 | 443-578-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | COCKEYSVL | MD |
| 2015-02-23 | 443-593-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | ELKTON | MD |
| 2015-02-23 | 443-776-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | ELKRIDGE | MD |
| 2015-02-23 | 443-792-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | BRYNPKLNCM | MD |
| 2015-02-23 | 443-881-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | REISTERSTN | MD |
| 2015-02-23 | 443-943-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | SPARROWSPT | MD |
| 2015-02-19 | 443-328-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | SYKESVILLE | MD |
| 2015-02-19 | 443-338-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | SPARKSGLNC | MD |
| 2015-02-19 | 443-419-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | GLENWOOD | MD |
| 2015-02-19 | 443-584-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | CROFTON | MD |
| 2015-02-19 | 443-606-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | FORK | MD |
| 2015-02-19 | 443-626-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | CHASE | MD |
| 2015-02-19 | 443-737-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | WATERLO238 | MD |
| 2015-02-19 | 443-906-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | SEVERNA PK | MD |
| 2015-02-17 | 443-362-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | EASTON | MD |
| 2015-02-17 | 443-620-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | WATERLO238 | MD |
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.