NumberResearchRecent thousands-block assignments
2 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 410
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 |
|---|---|---|---|---|---|---|---|
| 2009-02-25 | 410-870-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | PARKVILLE | MD |
| 2009-02-02 | 410-384-8XXX | 8000–8999 | Assigned | YMAX COMMUNICATIONS CORP. - MD | 281E | SEVERNA PK | MD |
| 2009-02-02 | 410-541-9XXX | 9000–9999 | Assigned | YMAX COMMUNICATIONS CORP. - MD | 281E | SEVERNA PK | MD |
| 2009-01-30 | 410-696-8XXX | 8000–8999 | Assigned | YMAX COMMUNICATIONS CORP. - MD | 281E | ELLICOTTCY | MD |
| 2009-01-13 | 410-497-4XXX | 4000–4999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | PARKVILLE | MD |
| 2009-01-06 | 410-861-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | WESTMINSTR | MD |
| 2009-01-05 | 410-824-4XXX | 4000–4999 | Assigned | YMAX COMMUNICATIONS CORP. - MD | 281E | WATERLO236 | MD |
| 2008-12-30 | 410-304-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | QUEENSTOWN | MD |
| 2008-12-09 | 410-352-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | BISHOPVL | MD |
| 2008-12-09 | 410-482-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | GREENSBORO | MD |
| 2008-12-09 | 410-600-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | BERLIN | MD |
| 2008-12-09 | 410-621-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | PRINCEANNE | MD |
| 2008-12-09 | 410-754-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | FEDERALSBG | MD |
| 2008-12-09 | 410-928-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | MILLINGTON | MD |
| 2008-12-09 | 410-941-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | JARRETTSVL | MD |
| 2008-11-26 | 410-415-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | PIKESVILLE | MD |
| 2008-11-19 | 410-205-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | PIKESVILLE | MD |
| 2008-11-12 | 410-205-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | PIKESVILLE | MD |
| 2008-11-12 | 410-231-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | SOLOMONS | MD |
| 2008-11-12 | 410-343-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | SPARKSGLNC | MD |
| 2008-11-12 | 410-357-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | PARKTON | MD |
| 2008-11-12 | 410-417-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | EDGEWOOD | MD |
| 2008-11-12 | 410-429-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | WORTHINGTN | MD |
| 2008-11-12 | 410-497-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | PARKVILLE | MD |
| 2008-11-12 | 410-541-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | SEVERNA PK | MD |
| 2008-11-12 | 410-575-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | FORK | MD |
| 2008-11-12 | 410-635-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | NEWWINDSOR | MD |
| 2008-11-12 | 410-645-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | WOODLAWN | MD |
| 2008-11-12 | 410-656-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | NORTH EAST | MD |
| 2008-11-12 | 410-701-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | RANDALLSTN | MD |
| 2008-11-12 | 410-709-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | SPARROWSPT | MD |
| 2008-11-12 | 410-756-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | TANEYTOWN | MD |
| 2008-11-12 | 410-775-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | UNION BDG | MD |
| 2008-11-12 | 410-849-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | SHERWD FOR | MD |
| 2008-11-12 | 410-861-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | WESTMINSTR | MD |
| 2008-11-12 | 410-914-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | CHURCHVL | MD |
| 2008-11-12 | 410-929-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | BALTIMORE | MD |
| 2008-11-12 | 410-929-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | BALTIMORE | MD |
| 2008-11-12 | 410-929-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | BALTIMORE | MD |
| 2008-11-12 | 410-929-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | BALTIMORE | MD |
| 2008-11-12 | 410-929-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | BALTIMORE | MD |
| 2008-11-12 | 410-929-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | BALTIMORE | MD |
| 2008-11-12 | 410-941-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | JARRETTSVL | MD |
| 2008-11-03 | 410-975-8XXX | 8000–8999 | Assigned | YMAX COMMUNICATIONS CORP. - MD | 281E | SEVERNA PK | MD |
| 2008-10-21 | 410-213-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | OCEAN CITY | MD |
| 2008-10-03 | 410-443-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | EASTON | MD |
| 2008-09-29 | 410-709-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | SPARROWSPT | MD |
| 2008-09-10 | 410-709-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | SPARROWSPT | MD |
| 2008-09-10 | 410-914-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | CHURCHVL | MD |
| 2008-09-02 | 410-660-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | ELKRIDGE | 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.