NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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
8X8, INC. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2023-04-12 951-954 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H TEMECULA CA
2023-04-11 217-988 1XXX8XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J ARCOLA IL
2023-04-11 234-372 2XXX3XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H CHATHAM OH
2023-04-11 234-394 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H WADSWORTH OH
2023-04-11 272-317 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J KINGSTON PA
2023-04-11 272-318 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J STROUDSBG PA
2023-04-11 319-413 0XXX1XXX · 2 holders which blocks → ONVOY, LLC - IA 221F TROY MILLS IA
2023-04-11 320-473 1XXX2XXX · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J ST CLOUD MN
2023-04-11 343-319 not yet reported which blocks → Cogeco Connexion Inc. 221K Cornwall —
2023-04-11 367-223 not yet reported which blocks → Cogeco Connexion Inc. 221K Sept-Iles —
2023-04-11 385-527 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - UT 871E PAYSON UT
2023-04-11 435-351 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - UT 871E ST GEORGE UT
2023-04-11 448-480 0XXX8XXX9XXX · 2 holders which blocks → COMMIO, LLC 939H PANAMACITY FL
2023-04-11 472-473 0XXX1XXX2XXX3XXX8XXX · 2 holders which blocks → ONVOY, LLC - NC 638E WARSAW NC
2023-04-11 513-380 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H FELICITY OH
2023-04-11 660-971 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 SEDALIA MO
2023-04-11 740-813 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H ATHENS OH
2023-04-11 786-928 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 PERRINE FL
2023-04-11 786-929 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 KEYS FL
2023-04-11 786-931 0–9 XXXall 10 · 2 holders which blocks → FIVE9, INC. 598J MIAMI FL
2023-04-11 786-932 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 MIAMI FL
2023-04-11 937-385 0XXX1XXX3XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H DECATUR OH
2023-04-11 937-953 0XXX1XXX8XXX9XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H MANCHESTER OH
2023-04-11 971-450 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2023-04-11 971-451 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OR 750E BEAVERTON OR
2023-04-11 986-253 0XXX1XXX2XXX3XXX8XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J BONERSFRRY ID
2023-04-11 986-254 0XXX1XXX8XXX · 2 holders which blocks → ONVOY, LLC - ID 689F PRIESTLAKE ID
2023-04-11 986-255 1XXX2XXX5XXX · 3 holders which blocks → ONVOY, LLC - ID 689F SETTERS ID
2023-04-11 986-256 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - ID 689F BOISE ID
2023-04-10 262-452 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 PARKSIDE WI
2023-04-10 319-402 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J IOWA CITY IA
2023-04-10 319-403 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J CEDAR RPDS IA
2023-04-10 352-803 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BROOKSVL FL
2023-04-10 385-523 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2023-04-10 386-371 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FLAGLERBCH FL
2023-04-10 445-282 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J DOYLESTOWN PA
2023-04-10 534-213 1XXX9XXX · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J ELEVA WI
2023-04-10 608-894 0XXX1XXX2XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J ARCADIA WI
2023-04-10 608-896 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J MADISON WI
2023-04-10 716-647 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J BUFFALO NY
2023-04-10 740-717 7XXX which blocks → ONVOY SPECTRUM, LLC 624H RADNOR OH
2023-04-10 771-229 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSHNGTNZN1 DC
2023-04-10 835-216 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J AVONDALE PA
2023-04-10 835-217 0XXX5XXX6XXX · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J PARKESBURG PA
2023-04-10 941-317 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 PTCHARLOTT FL
2023-04-08 912-703 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - GA 8392 SAVANNAH GA
2023-04-07 213-606 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C LSAN DA 08 CA
2023-04-07 213-657 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C LSAN DA 13 CA
2023-04-07 213-658 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C LSAN DA 02 CA
2023-04-07 337-634 0–9 XXXall 10 · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J LK CHARLES LA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.