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
2023-05-05 737-359 0–9 XXXall 10 · 3 holders which blocks → HADLO TECHNOLOGIES, LLC 436J AUSTIN TX
2023-05-05 762-360 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 THOMASTON GA
2023-05-05 769-310 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NATCHEZ MS
2023-05-05 781-947 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 LYNN MA
2023-05-05 848-348 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 PERTHAMBOY NJ
2023-05-05 939-365 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 NARANJITO PR
2023-05-05 945-277 0–9 XXXall 10 · 4 holders which blocks → HADLO TECHNOLOGIES, LLC 436J DALLAS TX
2023-05-04 218-636 0XXX1XXX3XXX6XXX8XXX · 5 holders which blocks → PAUL BUNYAN RURAL TELEPHONE COOP. 4814 ORR MN
2023-05-04 239-445 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J FORT MYERS FL
2023-05-04 332-275 0–9 XXXall 10 · 3 holders which blocks → HADLO TECHNOLOGIES, LLC 436J NWYRCYZN01 NY
2023-05-04 334-890 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DOTHAN AL
2023-05-04 352-386 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 CLERMONT FL
2023-05-04 364-640 0XXX1XXX4XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H HICKMAN KY
2023-05-04 364-844 0XXX4XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H MAYFIELD KY
2023-05-04 369-200 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J DIXON CA
2023-05-04 385-531 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2023-05-04 448-228 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J PENSACOLA FL
2023-05-04 507-921 0XXX1XXX · 2 holders which blocks → ONVOY, LLC - MN 184D ELYSIAN MN
2023-05-04 507-930 0XXX1XXX · 2 holders which blocks → ONVOY, LLC - MN 184D BROWNSDALE MN
2023-05-04 516-970 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NASSAUZN07 NY
2023-05-04 530-952 0–9 XXXall 10 · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J PLVL WEST CA
2023-05-04 557-222 0–9 XXXall 10 · 5 holders which blocks → LEAP TELECOM, LLC 616J ST LOUIS MO
2023-05-04 561-925 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J WPALMBEACH FL
2023-05-04 573-908 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J JACKSON MO
2023-05-04 585-518 4XXX5XXX which blocks → ONVOY, LLC- NY 384C CORFU NY
2023-05-04 640-248 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J MOUNTHOLLY NJ
2023-05-04 681-786 0XXX6XXX7XXX · 3 holders which blocks → TERRA NOVA TELECOM INC. 145J OAKVALE WV
2023-05-04 681-871 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H WELCH WV
2023-05-04 682-418 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARLINGTON TX
2023-05-04 689-312 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 WINTERPARK FL
2023-05-04 727-625 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J CLEARWATER FL
2023-05-04 732-468 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DUNELLEN NJ
2023-05-04 754-315 0–9 XXXall 10 · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J FTLAUDERDL FL
2023-05-04 820-214 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 NEWBURYPRK CA
2023-05-04 820-215 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 NEWBURYPRK CA
2023-05-04 825-756 not yet reported which blocks → Iristel Inc. 154E Calgary —
2023-05-04 862-416 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PASSAIC NJ
2023-05-04 908-571 9XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J FRENCHTOWN NJ
2023-05-04 938-212 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ROGERSVL AL
2023-05-03 240-990 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LAUREL236 MD
2023-05-03 315-900 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E SEMPRONIUS NY
2023-05-03 321-470 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 COCOA FL
2023-05-03 334-883 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J DOTHAN AL
2023-05-03 364-360 0XXX1XXX3XXX8XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H DIXON KY
2023-05-03 438-575 not yet reported which blocks → Bell Mobility 6574 Montreal —
2023-05-03 445-283 0XXX1XXX2XXX7XXX8XXX9XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J DUBLIN PA
2023-05-03 559-830 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VISALIA CA
2023-05-03 559-839 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VISALIA CA
2023-05-03 562-675 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LONG BEACH CA
2023-05-03 562-681 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LONG BEACH CA

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.