Recent prefix assignments

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

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, last 30 days
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
2019-07-15 475-473 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CT 639C WOODBURY CT
2019-07-15 475-500 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CT 639C GREENWICH CT
2019-07-15 475-600 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - CT 639C SEYMOUR CT
2019-07-15 475-900 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CT 639C GUILFORD CT
2019-07-15 480-574 0–9 XXXwhole prefix which blocks → QWEST CORPORATION 9636 PHOENIX AZ
2019-07-15 484-673 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F PHPHSBZN22 PA
2019-07-15 581-761 not yet reported which blocks → Bell Mobility 6574 Saint-Georges-de-Beauce —
2019-07-15 629-235 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F FRANKLIN TN
2019-07-15 959-300 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → ONVOY, LLC - CT 639C KENT CT
2019-07-15 959-400 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - CT 639C LAKEVILLE CT
2019-07-15 959-500 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - CT 639C LEDYARD CT
2019-07-15 959-600 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CT 639C PLAINFIELD CT
2019-07-15 959-800 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - CT 639C THOMASTON CT
2019-07-15 959-901 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CT 639C TORRINGTON CT
2019-07-15 971-357 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F PORTLAND OR
2019-07-12 404-777 0–9 XXXwhole prefix which blocks → ONVOY, LLC - GA 067D ATLANTA GA
2019-07-12 404-999 0–9 XXXwhole prefix which blocks → ONVOY, LLC - GA 067D ATLANTA GA
2019-07-12 406-316 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - MT 453F BOULDER MT
2019-07-12 406-419 0XXX1XXX2XXX4XXX5XXX6XXX · 3 holders which blocks → ONVOY, LLC - MT 453F VICTOR MT
2019-07-12 470-593 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E ATLANTA SO GA
2019-07-12 707-830 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HOPLAND CA
2019-07-12 813-578 0–9 XXXall 10 · 5 holders which blocks → AT&T - LOCAL 7421 PLANT CITY FL
2019-07-12 850-970 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - FL 937C MOLINO FL
2019-07-12 850-998 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - FL 937C GRACEVILLE FL
2019-07-12 971-356 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CLACKAMAS OR
2019-07-11 202-921 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSHNGTNZN1 DC
2019-07-11 260-264 0–9 XXXwhole prefix which blocks → ONVOY, LLC - IN 097D FORT WAYNE IN
2019-07-11 308-321 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 GRAND IS NE
2019-07-11 430-258 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARSHALL TX
2019-07-11 470-570 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - GA 067D MONROE GA
2019-07-11 484-742 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F EMMAUS PA
2019-07-11 725-225 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F MESQUITE NV
2019-07-11 802-481 0XXX1XXX2XXX3XXX4XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VT 9450 LEMINGTON VT
2019-07-11 912-420 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - GA 067D LYONS GA
2019-07-10 276-468 0XXX1XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RICHLANDS VA
2019-07-10 385-334 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2019-07-10 469-676 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F DALLAS TX
2019-07-10 540-792 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CULPEPER VA
2019-07-10 571-463 0–9 XXXall 10 · 4 holders which blocks → VOIP INNOVATIONS, LLC 597F ARCOLA VA
2019-07-09 470-621 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - GA 8392 ATLANTA NE GA
2019-07-09 571-487 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ARCOLA VA
2019-07-09 970-561 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J WINDSOR CO
2019-07-09 971-354 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 TILLAMOOK OR
2019-07-08 251-310 0–9 XXXall 10 · 3 holders which blocks → AT&T - LOCAL 7421 BELLEFONTN AL
2019-07-08 401-328 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H PROVIDENCE RI
2019-07-08 469-965 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 DALLAS TX
2019-07-08 629-232 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F NASHVILLE TN
2019-07-08 743-202 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 LEXINGTON NC
2019-07-08 743-212 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E MOUNT AIRY NC
2019-07-08 825-604 not yet reported which blocks → Iristel Inc. 154E Edmonton —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.