NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
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
2003-06-04 317-363 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDIANAPLS IN
2003-06-04 317-366 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
2003-06-04 574-302 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTH BEND IN
2003-06-04 574-303 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2003-06-04 850-515 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 HOLLEYNVRR FL
2003-06-04 863-368 3XXX4XXX5XXX6XXX7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 AVON PARK FL
2003-06-03 250-264 not yet reported which blocks → TELUS 8086 Fort St. John —
2003-06-03 250-501 not yet reported which blocks → TELUS 8086 Keremeos —
2003-06-03 386-466 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 LAKE CITY FL
2003-06-03 435-253 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 FILLMORE UT
2003-06-03 573-777 0–9 XXXall 10 · 3 holders which blocks → SOCKET TELECOM, LLC - MO 554A COLUMBIA MO
2003-06-03 573-982 0XXX1XXX2XXX3XXX4XXX6XXX7XXX9XXX · 5 holders which blocks → ONVOY, LLC - MO 093F CENTRALIA MO
2003-06-03 575-418 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 SOCORRO NM
2003-06-03 740-478 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LAURELVL OH
2003-06-02 334-441 0XXX1XXX2XXX3XXX4XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 ABBEVILLE AL
2003-06-02 507-588 4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCC TELEPHONY OF MINNESOTA, LLC - MN 719F LK CRYSTAL MN
2003-06-02 514-791 not yet reported which blocks → Bell Mobility 6574 Montreal —
2003-06-02 601-219 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 CENTREVL MS
2003-06-02 601-673 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHERN COMMUNICATIONS SERVICES, INC. 6744 LUCEDALE MS
2003-06-02 601-702 2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → CELLULAR SOUTH, INC. 6581 PORTGIBSON MS
2003-06-02 709-235 not yet reported which blocks → Aliant Telecom (NF) 8085 Gander —
2003-06-02 709-293 not yet reported which blocks → Aliant Telecom (NF) 8085 Grand Falls —
2003-06-02 709-638 not yet reported which blocks → Aliant Telecom (NF) 8085 Corner Brook —
2003-06-02 812-519 5XXX8XXX9XXX which blocks → PAETEC ITEL, LLC 829J SEYMOUR IN
2003-06-02 812-578 3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J BEDFORD IN
2003-06-02 812-642 3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J WASHINGTON IN
2003-06-02 907-715 not yet reported which blocks → GCI COMMUNICATION CORP. DBA GENERAL COMMUNICATION 6872 WASILLA AK
2003-06-02 936-337 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 NEWWAVERLY TX
2003-06-02 956-259 not yet reported which blocks → SMARTCOM TELEPHONE, LLC 4866 EDINBURG TX
2003-06-02 956-260 not yet reported which blocks → SMARTCOM TELEPHONE, LLC 4866 MERCEDES TX
2003-05-30 217-550 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2003-05-30 318-430 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 HORNBECK LA
2003-05-30 318-498 4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WINNSBORO LA
2003-05-30 318-499 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MER ROUGE LA
2003-05-30 318-501 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 EPPS LA
2003-05-30 318-502 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 COLUMBIA LA
2003-05-30 318-510 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 SHREVEPORT LA
2003-05-30 318-521 1XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 NATCHITCHS LA
2003-05-30 906-236 7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MARQUETTE MI
2003-05-30 909-728 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FONTANA CA
2003-05-30 909-831 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 S BERNDINO CA
2003-05-30 918-314 3XXX4XXX5XXX6XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 GROVE OK
2003-05-30 918-315 3XXX4XXX6XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 SALLISAW OK
2003-05-30 918-316 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TAHLEQUAH OK
2003-05-30 951-500 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2003-05-29 320-335 1XXX2XXX · 2 holders which blocks → ONVOY, LLC - MN 184D ALEXANDRIA MN
2003-05-29 334-550 0XXX1XXX2XXX3XXX4XXX7XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 NEWVILLE AL
2003-05-29 580-516 not yet reported which blocks → PANHANDLE TELECOMMUNICATIONS SYSTEMS, INC. 468B FELTWHLESS OK
2003-05-29 580-517 not yet reported which blocks → PANHANDLE TELECOMMUNICATIONS SYSTEMS, INC. 468B BOISE CITY OK
2003-05-29 580-518 not yet reported which blocks → PANHANDLE TELECOMMUNICATIONS SYSTEMS, INC. 468B KEYES OK

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.