NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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 26
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
2011-06-21 832-491 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOUSTON TX
2011-06-21 832-538 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOUSTON TX
2011-06-21 832-544 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2011-06-21 832-547 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2011-06-21 832-726 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOUSTON TX
2011-06-21 864-359 0–9 XXXall 10 · 5 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 ANDERSON SC
2011-06-20 202-505 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC 6402 WSHNGTNZN1 DC
2011-06-20 225-249 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2011-06-20 302-257 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF DELAWARE, LLC - DE 349F DOVER DE
2011-06-20 404-793 0–9 XXXall 10 · 2 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2011-06-20 619-826 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C DULZURA CA
2011-06-20 646-699 0–9 XXXall 10 · 5 holders which blocks → BARR TELL USA, INC. - NY 525G NWYRCYZN01 NY
2011-06-20 858-242 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2011-06-20 872-233 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2011-06-20 931-651 1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CITIZENS COMM CO TN DBA FRONTIER COMM OF TN, LLC 4336 COOKEVILLE TN
2011-06-17 201-279 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 KEARNY NJ
2011-06-17 209-661 0–9 XXXall 10 · 8 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MODESTO CA
2011-06-17 226-935 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Windsor —
2011-06-17 312-221 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2011-06-17 336-405 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 GREENSBORO NC
2011-06-17 506-998 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Fredericton —
2011-06-17 581-645 not yet reported which blocks → Videotron Ltd. 8306 Trois-Pistoles —
2011-06-17 681-229 0–9 XXXall 10 · 8 holders which blocks → METROPCS, INC. 5562 PRKRSBGZN1 WV
2011-06-17 848-222 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 LAKEWOOD NJ
2011-06-17 856-238 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 VINELAND NJ
2011-06-17 862-255 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 NEWARK NJ
2011-06-16 205-460 0–9 XXXall 10 · 7 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 BIRMINGHAM AL
2011-06-16 385-201 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2011-06-16 458-205 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 TELECOM OF OREGON, LLC - OR 7537 EUGENE OR
2011-06-16 505-444 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 AZTEC NM
2011-06-16 717-287 0–9 XXXall 10 · 5 holders which blocks → WINDSTREAM D & E SYSTEMS, INC. - PA 4114 ELIZABTHTN PA
2011-06-16 862-238 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 PASSAIC NJ
2011-06-15 205-452 0–9 XXXall 10 · 6 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 SPRINGVL AL
2011-06-15 226-216 not yet reported which blocks → Distributel 082E Windsor —
2011-06-15 407-280 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 WINTERPARK FL
2011-06-15 561-221 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2011-06-15 561-223 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 WPALMBEACH FL
2011-06-15 587-671 not yet reported which blocks → Distributel 081E Leduc —
2011-06-15 587-672 not yet reported which blocks → Distributel 081E Beaumont —
2011-06-15 587-673 not yet reported which blocks → Distributel 081E Drayton Valley —
2011-06-15 587-674 not yet reported which blocks → Distributel 081E Fort McMurray —
2011-06-15 587-689 not yet reported which blocks → Distributel 081E Edmonton —
2011-06-15 708-264 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-06-15 778-693 not yet reported which blocks → Navigata Communications Limited 078G Prince George —
2011-06-15 786-224 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 MIAMI FL
2011-06-15 813-280 0–9 XXXall 10 · 4 holders which blocks → MCI WORLDCOM COMMUNICATIONS, INC. - FL 7448 TAMPACEN FL
2011-06-15 819-881 not yet reported which blocks → Distributel 083E Ottawa-Hull —
2011-06-15 872-232 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2011-06-15 954-271 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J FTLAUDERDL FL
2011-06-15 954-278 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF FLORIDA, LLC - FL 902E FTLAUDERDL FL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.