NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 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
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
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
2004-07-22 214-714 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2004-07-22 214-991 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2004-07-22 361-404 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PALACIOS TX
2004-07-22 709-743 not yet reported which blocks → Aliant Telecom (NF) 8085 St. John's —
2004-07-22 845-820 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 MIDDLETOWN NY
2004-07-22 905-582 not yet reported which blocks → TELUS Integrated Communications 2782 Oakville —
2004-07-22 910-715 0–9 XXXwhole prefix which blocks → BRIGHTSPEED OF EASTERN NORTH CAROLINA, LLC 0470 PINEHURST NC
2004-07-21 248-995 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 ROYAL OAK MI
2004-07-21 309-588 0XXX1XXX3XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MACOMB IL
2004-07-21 614-360 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 COLUMBUS OH
2004-07-21 843-256 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J ISLE PALMS SC
2004-07-21 937-401 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 DAYTON OH
2004-07-20 262-201 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K GENESEE WI
2004-07-20 570-731 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F SAYRE PA
2004-07-20 630-701 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 AURORA IL
2004-07-20 701-557 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BISMARCK ND
2004-07-20 773-600 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2004-07-20 985-677 7XXX9XXX · 2 holders which blocks → VOICESTREAM GSM I, LLC 150C LAROSE LA
2004-07-19 203-620 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 DARIEN CT
2004-07-19 203-827 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 OLDGRNWICH CT
2004-07-19 229-213 0–9 XXXall 10 · 6 holders which blocks → SOUTHERN COMMUNICATIONS SERVICES, INC. 6744 PELHAM GA
2004-07-19 407-200 0–9 XXXall 10 · 2 holders which blocks → CENTURYLINK COMMUNICATIONS LLC - FL 7391 WINTERPARK FL
2004-07-19 570-249 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 JIM THORPE PA
2004-07-19 570-335 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 SCRANTON PA
2004-07-19 575-207 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLAYTON NM
2004-07-19 575-512 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANTA ROSA NM
2004-07-19 804-922 0–9 XXXall 10 · 3 holders which blocks → VERIZON VIRGINIA, INC. 9213 RICHMOND VA
2004-07-19 814-201 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 ALTOONA PA
2004-07-16 229-212 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MCRAE GA
2004-07-16 336-443 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 DOBSON NC
2004-07-15 320-300 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MN 5256 GLENCOE MN
2004-07-15 410-300 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 ELKRIDGE MD
2004-07-15 507-203 0–9 XXXall 10 · 3 holders which blocks → MCC TELEPHONY OF MINNESOTA, LLC - MN 719F BROWNSDALE MN
2004-07-15 908-458 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J SOMERVILLE NJ
2004-07-15 936-201 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANAUGUSTN TX
2004-07-15 940-353 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MILLSAP TX
2004-07-14 251-213 2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FOLEY AL
2004-07-14 251-215 0–9 XXXall 10 · 3 holders which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 FOLEY AL
2004-07-14 254-210 3XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OLDEN TX
2004-07-14 307-274 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CHEYENNE WY
2004-07-14 319-213 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CEDAR RPDS IA
2004-07-14 320-345 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MN 7783 ST CLOUD MN
2004-07-14 432-207 3XXX6XXX8XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 VAN HORN TX
2004-07-14 515-418 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DES MOINES IA
2004-07-14 563-209 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DAVENPORT IA
2004-07-14 605-553 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SIOUX FLS SD
2004-07-14 702-403 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2004-07-14 712-212 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SIOUX CITY IA
2004-07-14 940-284 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MYRA TX
2004-07-14 940-351 2XXX4XXX5XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JACKSBORO TX

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.