NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

5 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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
BANDWIDTH.COM CLEC, LLC - MD 3
OPENTACT INC. 1
ONVOY, LLC - MD 1
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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2020-03-31 240-673-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D WSHNGTNZN2 MD
2020-03-31 240-697-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D MECHANCSVL MD
2020-03-31 240-697-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D MECHANCSVL MD
2020-03-31 240-709-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LAUREL236 MD
2020-03-31 240-907-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D WSNGTNZN10 MD
2020-03-23 240-266-3XXX 3000–3999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG236Z14 MD
2020-03-23 240-514-6XXX 6000–6999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNGTNZN11 MD
2020-03-23 240-539-3XXX 3000–3999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSHNGTNZN4 MD
2020-03-23 240-695-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSHNGTNZN5 MD
2020-03-23 240-709-4XXX 4000–4999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G LAUREL236 MD
2020-03-20 240-721-1XXX 1000–1999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN5 MD
2020-03-20 240-721-2XXX 2000–2999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN5 MD
2020-03-20 240-721-3XXX 3000–3999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN5 MD
2020-03-20 240-721-4XXX 4000–4999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN5 MD
2020-03-20 240-721-5XXX 5000–5999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN5 MD
2020-03-20 240-721-6XXX 6000–6999Assigned VERIZON MARYLAND, INC. 9212 WSHNGTNZN5 MD
2020-03-17 240-331-3XXX 3000–3999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSHNGTNZN3 MD
2020-03-17 240-414-6XXX 6000–6999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSHNGTNZN6 MD
2020-03-17 240-591-0XXX 0000–0999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G HAGERSTOWN MD
2020-03-09 240-790-4XXX 4000–4999Assigned METROPCS, INC. 5562 WSNG236Z13 MD
2020-02-28 240-526-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LEONARDTN MD
2020-02-28 240-526-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LEONARDTN MD
2020-02-28 240-526-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LEONARDTN MD
2020-02-20 240-591-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 HAGERSTOWN MD
2020-02-17 240-540-3XXX 3000–3999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNG238Z13 MD
2020-02-17 240-653-3XXX 3000–3999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G LAUREL238 MD
2020-02-13 240-698-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 MYERSVILLE MD
2020-02-12 240-709-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LAUREL236 MD
2020-02-12 240-709-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LAUREL236 MD
2020-01-28 240-659-1XXX 1000–1999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ASHTON236 MD
2020-01-27 240-590-6XXX 6000–6999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSNGTNZN12 MD
2020-01-27 240-858-5XXX 5000–5999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G WSHNGTNZN2 MD
2020-01-25 240-384-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 LXTNPKGRML MD
2020-01-23 240-594-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 BITTINGER MD
2020-01-14 240-539-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN4 MD
2019-12-31 240-681-0XXX 0000–0999Assigned METROPCS, INC. 5562 BRANDYWINE MD
2019-12-31 240-709-0XXX 0000–0999Assigned METROPCS, INC. 5562 LAUREL236 MD
2019-12-30 240-710-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 FREDERICK MD
2019-12-30 240-710-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 FREDERICK MD
2019-12-30 240-710-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 FREDERICK MD
2019-12-30 240-710-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 FREDERICK MD
2019-12-30 240-710-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 FREDERICK MD
2019-12-30 240-710-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 FREDERICK MD
2019-12-30 240-710-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 FREDERICK MD
2019-12-30 240-710-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 FREDERICK MD
2019-12-30 240-710-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 FREDERICK MD
2019-12-30 240-710-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 FREDERICK MD
2019-12-26 240-725-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LXTNPKGRML MD
2019-12-10 240-569-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D FLINTSTONE MD
2019-12-10 240-569-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D FLINTSTONE 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.