NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

357 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 27
ONVOY, LLC - NJ 20
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
2002-04-18 518-379 0XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 SCHENCTADY NY
2002-04-18 580-830 8XXX which blocks → T-MOBILE USA, INC. 6529 PERRY OK
2002-04-18 612-465 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 4139 TWINCITIES MN
2002-04-18 631-807 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2002-04-18 774-248 3XXX6XXX7XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 HOPKINTON MA
2002-04-18 848-228 2XXX3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 NEWBRNSWCK NJ
2002-04-18 862-242 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 6 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 MORRISTOWN NJ
2002-04-17 202-528 none assigned yet which blocks → METROPCS, INC. 5562 WSHNGTNZN1 DC
2002-04-17 207-807 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PORTLAND ME
2002-04-17 216-236 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FIRST COMMUNICATIONS, LLC 460K INDEPNDNCE OH
2002-04-17 309-613 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 PEKIN IL
2002-04-17 330-398 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 YOUNGSTOWN OH
2002-04-17 402-805 3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LINCOLN NE
2002-04-17 504-419 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JESUITBEND LA
2002-04-17 541-351 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 NEWPORT OR
2002-04-17 573-281 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 MALDEN MO
2002-04-17 585-201 2XXX3XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 BATAVIA NY
2002-04-17 614-642 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FIRST COMMUNICATIONS, LLC 460K WJEFFERSON OH
2002-04-17 614-654 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FIRST COMMUNICATIONS, LLC 460K LOCKBOURNE OH
2002-04-17 614-655 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FIRST COMMUNICATIONS, LLC 460K REYNOLDSBG OH
2002-04-17 614-656 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FIRST COMMUNICATIONS, LLC 460K NEW ALBANY OH
2002-04-17 614-991 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → FIRST COMMUNICATIONS, LLC 460K GROVE CITY OH
2002-04-17 614-992 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FIRST COMMUNICATIONS, LLC 460K HARRISBURG OH
2002-04-17 614-993 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → FIRST COMMUNICATIONS, LLC 460K GROVEPORT OH
2002-04-17 614-994 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → FIRST COMMUNICATIONS, LLC 460K CANALWHSTR OH
2002-04-17 614-996 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FIRST COMMUNICATIONS, LLC 460K ALTON OH
2002-04-17 712-435 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 COUNCILBLF IA
2002-04-17 716-563 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BUFFALO NY
2002-04-17 812-664 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 PRINCETON IN
2002-04-17 908-837 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 BELLE MEAD NJ
2002-04-17 928-533 none assigned yet which blocks → T-MOBILE USA, INC. 6529 PRESCOTT AZ
2002-04-17 985-237 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MANDEVILLE LA
2002-04-16 219-354 0–9 XXXall 10 · 7 holders which blocks → FIRST COMMUNICATIONS, LLC 460K E CHICAGO IN
2002-04-16 219-390 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 CEDAR LAKE IN
2002-04-16 319-255 0–9 XXXall 10 · 2 holders which blocks → LOCAL TELEPHONE DATA SERVICES CORP. 2842 COLUMBSJCT IA
2002-04-16 405-926 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 PAULS VLY OK
2002-04-16 407-288 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KISSIMMEE FL
2002-04-16 416-850 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 8377 Toronto —
2002-04-16 440-409 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
2002-04-16 509-844 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → INTRADO COMMUNICATIONS, LLC 841C SPOKANE WA
2002-04-16 514-562 not yet reported which blocks → Fido Solutions Inc. 5643 Montreal —
2002-04-16 540-424 4XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FREDECKSBG VA
2002-04-16 551-358 3XXX4XXX5XXX7XXX8XXX which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 JERSEYCITY NJ
2002-04-16 551-404 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 HACKENSACK NJ
2002-04-16 580-823 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 TONKAWA OK
2002-04-16 614-916 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 GROVEPORT OH
2002-04-16 647-895 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2002-04-16 740-324 1XXX2XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 MT VERNON OH
2002-04-16 754-244 not yet reported which blocks → METROPCS, INC. 5562 HOLLYWOOD FL
2002-04-16 754-245 not yet reported which blocks → METROPCS, INC. 5562 CORAL SPG FL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.