NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
2014-12-23 747-238 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D BRBN BRBN CA
2014-12-23 857-770 0–9 XXXall 10 · 5 holders which blocks → INTRADO COMMUNICATIONS, LLC 116E BOSTON MA
2014-12-23 862-325 0–9 XXXall 10 · 4 holders which blocks → CABLEVISION LIGHTPATH, INC. - NJ 4948 MORRISTOWN NJ
2014-12-23 909-656 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CLAREMONT CA
2014-12-23 909-678 0–9 XXXall 10 · 2 holders which blocks → METROPCS NETWORKS, LLC 899D ONTARIO CA
2014-12-23 929-368 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NWYRCYZN05 NY
2014-12-23 937-970 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - OH 464C CEDARVILLE OH
2014-12-23 985-303 0–9 XXXall 10 · 8 holders which blocks → METROPCS, INC. 5562 HOUMA LA
2014-12-22 224-458 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 NORTHBROOK IL
2014-12-22 305-927 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 KEYS FL
2014-12-22 314-328 0–9 XXXall 10 · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K ST LOUIS MO
2014-12-22 323-670 0–9 XXXwhole prefix which blocks → METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2014-12-22 323-827 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2014-12-22 352-571 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 WILDWOOD FL
2014-12-22 470-575 0–9 XXXall 10 · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C ATLANTA GA
2014-12-22 559-652 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 FRESNO CA
2014-12-22 581-538 not yet reported which blocks → TELUS Quebec 2243 Boischatel —
2014-12-22 581-539 not yet reported which blocks → TELUS Quebec 2243 Notre-Dame-des-Laurentides —
2014-12-22 581-540 not yet reported which blocks → TELUS Quebec 2243 Ste-Anne-de-Beaupre —
2014-12-22 581-541 not yet reported which blocks → TELUS Quebec 2243 Ste-Brigitte-de-Laval —
2014-12-22 581-542 not yet reported which blocks → TELUS Quebec 2243 Ste-Catherine —
2014-12-22 661-488 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LANCASTER CA
2014-12-22 702-602 0–9 XXXall 10 · 4 holders which blocks → WIDE VOICE, LLC - NV 253F JEAN NV
2014-12-22 717-594 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J NEWBLOMFLD PA
2014-12-22 727-316 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 CLEARWATER FL
2014-12-22 786-878 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 MIAMI FL
2014-12-22 803-999 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - SC 548E COLUMBIA SC
2014-12-19 224-507 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DEERFIELD IL
2014-12-19 231-655 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MANISTEE MI
2014-12-19 307-209 0–9 XXXall 10 · 8 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 ROCK SPG WY
2014-12-19 361-412 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 VICTORIA TX
2014-12-19 579-252 not yet reported which blocks → TELUS Quebec 2243 Chomedey —
2014-12-19 579-253 not yet reported which blocks → TELUS Quebec 2243 Ste-Julie-de-Vercheres —
2014-12-19 734-892 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C PLYMOUTH MI
2014-12-19 786-599 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 MIAMI FL
2014-12-19 786-774 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 MIAMI FL
2014-12-19 786-779 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 MIAMI FL
2014-12-19 843-920 0–9 XXXall 10 · 3 holders which blocks → PALMETTO TELEPHONE COMMUNICATIONS, LLC - SC 154C HOLLYWOOD SC
2014-12-19 873-396 not yet reported which blocks → TELUS Quebec 2243 Gatineau —
2014-12-19 873-397 not yet reported which blocks → TELUS Quebec 2243 Aylmer —
2014-12-19 901-530 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MEMPHIS TN
2014-12-19 915-303 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C EL PASO TX
2014-12-19 956-416 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 RIGRANDECY TX
2014-12-19 980-434 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NC 638E STATESVL NC
2014-12-18 317-943 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - IN 097D DANVILLE IN
2014-12-18 317-953 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D NEWPALSTIN IN
2014-12-18 516-563 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN02 NY
2014-12-18 631-372 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2014-12-18 669-257 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SAN MARTIN CA
2014-12-18 769-235 0–9 XXXall 10 · 6 holders which blocks → AIRUS, INC. - MS 459H JACKSON MS

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.