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
2011-01-31 801-970 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
2011-01-31 956-336 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BROWNSVL TX
2011-01-28 203-717 0–9 XXXall 10 · 5 holders which blocks → CSC VOICE, LLC 612K GREENWICH CT
2011-01-28 347-793 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN06 NY
2011-01-28 470-202 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA 7435 BUFORD GA
2011-01-28 514-419 not yet reported which blocks → Videotron Ltd. 8306 Montreal —
2011-01-28 516-406 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 NASSAUZN02 NY
2011-01-28 581-741 not yet reported which blocks → Videotron Ltd. 8306 Quebec —
2011-01-28 604-446 not yet reported which blocks → Videotron Ltd. 383F Vancouver —
2011-01-28 647-909 not yet reported which blocks → Videotron Ltd. 383F Toronto —
2011-01-27 435-525 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ST GEORGE UT
2011-01-27 801-980 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F AMERCNFORK UT
2011-01-27 804-933 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 RICHMOND VA
2011-01-26 248-285 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PONTIAC MI
2011-01-26 408-680 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 CAMPBELL CA
2011-01-26 479-600 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRAVETTE AR
2011-01-26 516-405 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NASSAUZN03 NY
2011-01-26 973-861 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 PASSAIC NJ
2011-01-25 323-412 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 02 CA
2011-01-25 360-975 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VANCOUVER WA
2011-01-25 412-737 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2011-01-25 414-239 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MILWAUKZN1 WI
2011-01-25 438-391 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2011-01-25 514-742 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2011-01-25 559-384 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C BURREL CA
2011-01-25 724-672 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 GREENSBURG PA
2011-01-25 769-264 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → AT&T ENTERPRISES, LLC 516C OSYKA MS
2011-01-25 807-444 not yet reported which blocks → Bell Mobility 6574 Kenora —
2011-01-25 831-453 0–9 XXXall 10 · 7 holders which blocks → AT&T ENTERPRISES, LLC 516C CASTROVL CA
2011-01-25 909-302 0–9 XXXall 10 · 5 holders which blocks → PACIFIC BELL 9740 FONTANA CA
2011-01-25 918-644 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
2011-01-24 614-427 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 COLUMBUS OH
2011-01-21 226-207 not yet reported which blocks → TELUS Integrated Communications 2782 Harrow —
2011-01-21 469-600 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2011-01-21 470-253 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA 7435 CUMMING GA
2011-01-21 620-337 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C ATTICA KS
2011-01-21 785-572 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C FRANKFORT KS
2011-01-21 806-485 not yet reported which blocks → VEXUS 4913 LITTLEFLD TX
2011-01-21 806-569 not yet reported which blocks → VEXUS 4913 WHITHARRAL TX
2011-01-21 907-231 0–9 XXXall 10 · 3 holders which blocks → TELALASKA CELLULAR, INC. 588F ANCHORAGE AK
2011-01-20 210-701 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANANTONIO TX
2011-01-20 315-818 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E EVANSMILLS NY
2011-01-20 347-818 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN03 NY
2011-01-20 620-600 0XXX1XXX5XXX6XXX · 4 holders which blocks → UNITED WIRELESS COMMUNICATIONS, INC. 401D ELKHART KS
2011-01-20 913-998 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY KS
2011-01-20 952-300 0–9 XXXall 10 · 7 holders which blocks → FRONTIER COMMUNICATIONS OF MINNESOTA, INC. 1367 TWINCITIES MN
2011-01-19 202-200 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 WSHNGTNZN1 DC
2011-01-19 202-300 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 WSHNGTNZN1 DC
2011-01-19 202-500 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN1 DC
2011-01-19 323-407 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 02 CA

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.