NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
ONVOY, LLC - NJ 15
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
2004-11-24 530-816 3XXX7XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHESTER CA
2004-11-24 787-524 0–9 XXXwhole prefix which blocks → PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2004-11-23 215-307 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 PHLDLPHZN2 PA
2004-11-23 217-504 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DANVILLE IL
2004-11-23 309-504 0–9 XXXall 10 · 8 holders which blocks → YMAX COMMUNICATIONS CORP. - IL 259E DANVERS IL
2004-11-23 334-402 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 CLIO AL
2004-11-23 570-369 0–9 XXXall 10 · 4 holders which blocks → SERVICE ELECTRIC TELEPHONE COMPANY, LLC 8320 STROUDSBG PA
2004-11-23 616-788 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GREENVILLE MI
2004-11-23 617-459 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2004-11-23 647-866 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2004-11-23 647-868 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2004-11-23 647-869 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2004-11-23 801-419 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J SALT LAKE UT
2004-11-23 845-707 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 MONTICELLO NY
2004-11-23 951-526 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 TEMECULA CA
2004-11-22 217-320 1XXX2XXX3XXX4XXX5XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JACKSONVL IL
2004-11-22 217-506 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 QUINCY IL
2004-11-22 224-210 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2004-11-22 239-343 0–9 XXXwhole prefix which blocks → CENTURYLINK OF FLORIDA, INC. (UNITED) 0341 FORT MYERS FL
2004-11-22 240-770 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J WSHNGTNZN4 MD
2004-11-22 250-520 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Kimberley —
2004-11-22 267-544 0–9 XXXall 10 · 8 holders which blocks → COMCAST IP PHONE, LLC 318J BUCKINGHAM PA
2004-11-22 309-503 0–9 XXXall 10 · 7 holders which blocks → MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F TOWANDA IL
2004-11-22 409-227 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LUMBERTON TX
2004-11-22 678-663 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 ATLANTA GA
2004-11-22 678-789 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 ATLANTA GA
2004-11-22 724-261 0–9 XXXall 10 · 5 holders which blocks → CITIZENS TELECOM SOLUTIONS, LLC - PA 050A GREENSBURG PA
2004-11-22 828-587 2XXX which blocks → FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - NC 0509 SYLVA NC
2004-11-22 828-745 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J CASHIERS NC
2004-11-19 229-218 0–9 XXXall 10 · 2 holders which blocks → MCC TELEPHONY LLC 593K ENIGMA GA
2004-11-19 229-350 0–9 XXXall 10 · 4 holders which blocks → MCC TELEPHONY LLC 593K SPARKS GA
2004-11-19 229-576 not yet reported which blocks → MCC TELEPHONY LLC 593K HAHIRA GA
2004-11-19 250-500 not yet reported which blocks → Bell Mobility 6574 Fort Nelson —
2004-11-19 267-293 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J CARVERSVL PA
2004-11-19 478-220 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 EASTMAN GA
2004-11-19 514-659 not yet reported which blocks → Fido Solutions Inc. 5643 Montreal —
2004-11-19 514-690 not yet reported which blocks → Fido Solutions Inc. 5643 Montreal —
2004-11-19 514-691 not yet reported which blocks → Fido Solutions Inc. 5643 Montreal —
2004-11-19 514-692 not yet reported which blocks → Fido Solutions Inc. 5643 Montreal —
2004-11-19 514-699 not yet reported which blocks → Fido Solutions Inc. 5643 Montreal —
2004-11-19 540-507 0–9 XXXall 10 · 8 holders which blocks → VERIZON VIRGINIA, INC. 9213 SPOTSYLVAN VA
2004-11-19 575-497 9XXX which blocks → T-MOBILE USA, INC. 6529 TRUTHCQNCS NM
2004-11-19 601-844 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 BRIARWOOD MS
2004-11-19 601-963 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 BUCKATUNNA MS
2004-11-19 617-309 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J BOSTON MA
2004-11-19 678-862 0–9 XXXall 10 · 2 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 GAINESVL GA
2004-11-19 780-620 not yet reported which blocks → TELUS 8084 Fox Creek —
2004-11-19 780-830 not yet reported which blocks → TELUS 8084 Grande Prairie —
2004-11-19 806-717 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 DUMAS TX
2004-11-19 912-467 0–9 XXXall 10 · 5 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ST MARYS GA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.