NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, all time — NPA 561
BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 198
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 101
NEW CINGULAR WIRELESS PCS, LLC - GA 84
OMNIPOINT MIAMI E LICENSE, LLC 71
ONVOY, LLC - FL 48
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 NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2019-05-17 561-473 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C WPALMBEACH FL
2019-05-17 561-560 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - FL 937C BOCA RATON FL
2019-04-23 561-464 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2019-04-15 561-466 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2019-03-20 561-946 0–9 XXXall 10 · 4 holders which blocks → CORETEL FLORIDA, INC. - FL 481F WPALMBEACH FL
2019-03-19 561-468 0–9 XXXall 10 · 5 holders which blocks → CORETEL FLORIDA, INC. - FL 481F JUPITER FL
2019-03-19 561-639 0–9 XXXall 10 · 4 holders which blocks → CORETEL FLORIDA, INC. - FL 481F DELRAY BCH FL
2019-02-08 561-448 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E BELLEGLADE FL
2019-02-08 561-453 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E BOCA RATON FL
2019-02-08 561-462 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E PAHOKEE FL
2019-02-01 561-446 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 WPALMBEACH FL
2019-01-24 561-437 0–9 XXXall 10 · 4 holders which blocks → VOIP INNOVATIONS, LLC 597F WPALMBEACH FL
2019-01-22 561-426 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2019-01-22 561-428 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2018-11-20 561-581 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C JUPITER FL
2018-11-09 561-461 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C WPALMBEACH FL
2018-10-11 561-599 0–9 XXXall 10 · 4 holders which blocks → INVOXIO INCORPORATED 158H DELRAY BCH FL
2018-10-11 561-770 0–9 XXXall 10 · 8 holders which blocks → INVOXIO INCORPORATED 158H BOYNTONBCH FL
2018-10-11 561-788 0–9 XXXall 10 · 4 holders which blocks → INVOXIO INCORPORATED 158H WPALMBEACH FL
2018-10-11 561-888 0–9 XXXall 10 · 6 holders which blocks → TERRA NOVA TELECOM, INC. - FL 382G WPALMBEACH FL
2018-09-24 561-421 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E WPALMBEACH FL
2018-09-20 561-388 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 WPALMBEACH FL
2018-09-20 561-418 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 BOCA RATON FL
2018-08-14 561-382 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2018-08-14 561-384 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2018-08-13 561-380 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2018-08-10 561-397 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2018-08-10 561-399 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2018-05-23 561-377 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WPALMBEACH FL
2018-05-18 561-356 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 WPALMBEACH FL
2018-03-23 561-343 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2018-01-11 561-341 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 WPALMBEACH FL
2017-12-28 561-335 0–9 XXXall 10 · 5 holders which blocks → IDT AMERICA CORP. - FL 765A WPALMBEACH FL
2017-11-16 561-334 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BOCA RATON FL
2017-06-30 561-365 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J WPALMBEACH FL
2017-03-24 561-344 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 DELRAY BCH FL
2017-03-24 561-675 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 WPALMBEACH FL
2017-01-04 561-286 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 BELLEGLADE FL
2016-12-29 561-359 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J DELRAY BCH FL
2016-12-27 561-268 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WPALMBEACH FL
2016-10-26 561-774 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 DELRAY BCH FL
2016-10-26 561-931 0–9 XXXall 10 · 7 holders which blocks → COMCAST IP PHONE, LLC 318J BOCA RATON FL
2016-09-14 561-720 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 WPALMBEACH FL
2016-09-07 561-812 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 WPALMBEACH FL
2016-07-26 561-903 0–9 XXXall 10 · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E BOYNTONBCH FL
2016-07-22 561-815 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J WPALMBEACH FL
2016-06-22 561-781 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E JUPITER FL
2016-05-25 561-657 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 WPALMBEACH FL
2016-05-13 561-569 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2016-02-04 561-332 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 DELRAY BCH FL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.