NumberResearchRecent thousands-block assignments
17 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026
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 |
|---|---|---|---|---|---|---|---|
| 2008-12-03 | 443-769-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | BALTIMORE | MD |
| 2008-11-26 | 443-536-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | WESTMINSTR | MD |
| 2008-11-26 | 443-898-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | PIKESVILLE | MD |
| 2008-11-14 | 443-949-1XXX | 1000–1999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | ANNAPOLIS | MD |
| 2008-11-12 | 443-203-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | WEST RIVER | MD |
| 2008-11-12 | 443-228-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | CHASE | MD |
| 2008-11-12 | 443-267-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | DARLINGTON | MD |
| 2008-11-12 | 443-280-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | SYKESVILLE | MD |
| 2008-11-12 | 443-291-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | HAMPSTEAD | MD |
| 2008-11-12 | 443-295-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | PRINCEFRCK | MD |
| 2008-11-12 | 443-296-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | WATERLO238 | MD |
| 2008-11-12 | 443-297-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | ARBUTUS | MD |
| 2008-11-12 | 443-302-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | CROFTON | MD |
| 2008-11-12 | 443-305-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | ARGRGBSNIS | MD |
| 2008-11-12 | 443-312-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | BRYNPKLNCM | MD |
| 2008-11-12 | 443-327-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | ABERDEEN | MD |
| 2008-11-12 | 443-353-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | COCKEYSVL | MD |
| 2008-11-12 | 443-364-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | ELLICOTTCY | MD |
| 2008-11-12 | 443-406-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | ELKTON | MD |
| 2008-11-12 | 443-424-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | CARDIFF | MD |
| 2008-11-12 | 443-470-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | TOWSON | MD |
| 2008-11-12 | 443-492-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | ELKRIDGE | MD |
| 2008-11-12 | 443-494-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | MILLERSVL | MD |
| 2008-11-12 | 443-502-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | HAVREGRACE | MD |
| 2008-11-12 | 443-579-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | ESSEX | MD |
| 2008-11-12 | 443-599-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | SEVERN | MD |
| 2008-11-12 | 443-650-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | REISTERSTN | MD |
| 2008-11-12 | 443-686-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | FALLSTON | MD |
| 2008-11-12 | 443-693-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | PERRYVILLE | MD |
| 2008-11-12 | 443-718-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | COLUMBIA | MD |
| 2008-11-12 | 443-731-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | PT DEPOSIT | MD |
| 2008-11-12 | 443-732-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | SILVER RUN | MD |
| 2008-11-12 | 443-805-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | GLENBURNIE | MD |
| 2008-11-12 | 443-837-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | ANNAPOLIS | MD |
| 2008-11-12 | 443-840-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | CATONSVL | MD |
| 2008-11-12 | 443-879-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | DUNDALK | MD |
| 2008-11-12 | 443-987-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | BEL AIR | MD |
| 2008-11-07 | 443-462-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | BALTIMORE | MD |
| 2008-11-07 | 443-693-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | PERRYVILLE | MD |
| 2008-11-07 | 443-731-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | PT DEPOSIT | MD |
| 2008-11-05 | 443-365-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | SALISBURY | MD |
| 2008-11-05 | 443-554-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | CHASE | MD |
| 2008-11-05 | 443-986-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | BALTIMORE | MD |
| 2008-10-31 | 443-529-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | BALTIMORE | MD |
| 2008-10-09 | 443-684-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | PRINCEFRCK | MD |
| 2008-10-08 | 443-438-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | BALTIMORE | MD |
| 2008-10-03 | 443-630-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | BALTIMORE | MD |
| 2008-09-25 | 443-789-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WESTMINSTR | MD |
| 2008-09-25 | 443-805-0XXX | 0000–0999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | GLENBURNIE | MD |
| 2008-09-24 | 443-470-2XXX | 2000–2999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | TOWSON | MD |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.