NumberResearchRecent thousands-block assignments
5 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 240
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 |
|---|---|---|---|---|---|---|---|
| 2015-06-08 | 240-562-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GAITHERSBG | MD |
| 2015-06-08 | 240-562-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GAITHERSBG | MD |
| 2015-06-08 | 240-562-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GAITHERSBG | MD |
| 2015-06-08 | 240-562-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GAITHERSBG | MD |
| 2015-06-08 | 240-562-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GAITHERSBG | MD |
| 2015-06-08 | 240-562-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GAITHERSBG | MD |
| 2015-06-08 | 240-782-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | DAMASCS236 | MD |
| 2015-06-08 | 240-800-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | WSHNGTNZN2 | MD |
| 2015-06-08 | 240-800-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | WSHNGTNZN2 | MD |
| 2015-06-08 | 240-802-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | WSHNGTNZN2 | MD |
| 2015-06-08 | 240-970-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MD | 876D | WSNGTNZN12 | MD |
| 2015-06-02 | 240-702-0XXX | 0000–0999 | Assigned | COMCAST IP PHONE, LLC | 318J | GAITHERSBG | MD |
| 2015-06-01 | 240-309-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | LEONARDTN | MD |
| 2015-06-01 | 240-623-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | WSHNGTNZN4 | MD |
| 2015-06-01 | 240-651-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | FREDERICK | MD |
| 2015-06-01 | 240-808-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | LEONARDTN | MD |
| 2015-05-29 | 240-633-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MD | 876D | HUGHESVL | MD |
| 2015-05-29 | 240-661-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MD | 876D | LXTNPKGRML | MD |
| 2015-05-28 | 240-219-9XXX | 9000–9999 | Assigned | ONVOY, LLC - MD | 876D | RIDGE | MD |
| 2015-05-28 | 240-466-9XXX | 9000–9999 | Assigned | ONVOY, LLC - MD | 876D | MECHANCSVL | MD |
| 2015-05-28 | 240-470-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MD | 876D | LAUREL236 | MD |
| 2015-05-28 | 240-503-3XXX | 3000–3999 | Assigned | ONVOY, LLC - MD | 876D | TOMPKINSVL | MD |
| 2015-05-28 | 240-546-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MD | 876D | WSNGTNZN16 | MD |
| 2015-05-28 | 240-556-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MD | 876D | WSNG236Z14 | MD |
| 2015-05-28 | 240-559-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MD | 876D | ASHTON236 | MD |
| 2015-05-28 | 240-623-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MD | 876D | WSHNGTNZN4 | MD |
| 2015-05-28 | 240-641-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MD | 876D | WSHNGTNZN3 | MD |
| 2015-05-28 | 240-684-8XXX | 8000–8999 | Assigned | ONVOY, LLC - MD | 876D | WSNG236Z13 | MD |
| 2015-05-28 | 240-745-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MD | 876D | DAMASCS236 | MD |
| 2015-05-28 | 240-754-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MD | 876D | WALDORF | MD |
| 2015-05-28 | 240-787-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MD | 876D | BRANDYWINE | MD |
| 2015-05-28 | 240-801-3XXX | 3000–3999 | Assigned | ONVOY, LLC - MD | 876D | GAITHERSBG | MD |
| 2015-05-28 | 240-808-8XXX | 8000–8999 | Assigned | ONVOY, LLC - MD | 876D | LEONARDTN | MD |
| 2015-05-28 | 240-892-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MD | 876D | WSNG236Z15 | MD |
| 2015-05-28 | 240-901-9XXX | 9000–9999 | Assigned | ONVOY, LLC - MD | 876D | LA PLATA | MD |
| 2015-05-28 | 240-903-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MD | 876D | INDIANHEAD | MD |
| 2015-05-27 | 240-466-0XXX | 0000–0999 | Assigned | BALTIMORE-WASHINGTON TELEPHONE (BWT) | 8697 | MECHANCSVL | MD |
| 2015-05-27 | 240-474-4XXX | 4000–4999 | Assigned | BALTIMORE-WASHINGTON TELEPHONE (BWT) | 8697 | GAITHERSBG | MD |
| 2015-05-27 | 240-633-3XXX | 3000–3999 | Assigned | BALTIMORE-WASHINGTON TELEPHONE (BWT) | 8697 | HUGHESVL | MD |
| 2015-05-27 | 240-661-9XXX | 9000–9999 | Assigned | BALTIMORE-WASHINGTON TELEPHONE (BWT) | 8697 | LXTNPKGRML | MD |
| 2015-05-27 | 240-901-1XXX | 1000–1999 | Assigned | BALTIMORE-WASHINGTON TELEPHONE (BWT) | 8697 | LA PLATA | MD |
| 2015-05-27 | 240-965-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | WSNG236Z13 | MD |
| 2015-05-27 | 240-972-9XXX | 9000–9999 | Assigned | BALTIMORE-WASHINGTON TELEPHONE (BWT) | 8697 | LAUREL238 | MD |
| 2015-05-20 | 240-641-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF MARYLAND, LLC | 568G | WSHNGTNZN3 | MD |
| 2015-05-12 | 240-488-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | OAKLAND | MD |
| 2015-05-08 | 240-366-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | WILLIAMSPT | MD |
| 2015-04-27 | 240-517-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | LAUREL238 | MD |
| 2015-04-27 | 240-517-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | LAUREL238 | MD |
| 2015-04-27 | 240-517-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | LAUREL238 | MD |
| 2015-04-24 | 240-356-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - MD | 071F | MYERSVILLE | 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.