NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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
2013-02-04 832-833 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 HOUSTON TX
2013-02-04 904-602 0–9 XXXall 10 · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 ORANGEPARK FL
2013-02-04 909-360 0–9 XXXall 10 · 8 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J UPLAND CA
2013-02-04 949-445 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SADLBK VLY CA
2013-02-04 951-339 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J CORONA CA
2013-02-04 951-363 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J MORENO CA
2013-02-02 734-739 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PINCKNEY MI
2013-02-01 234-251 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K UNIONTOWN OH
2013-02-01 248-216 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MILFDWH LK MI
2013-02-01 248-222 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MILFDWH LK MI
2013-02-01 248-297 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CLARKSTON MI
2013-02-01 248-492 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CLARKSTON MI
2013-02-01 248-638 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MILFDWH LK MI
2013-02-01 248-718 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ORTONVILLE MI
2013-02-01 248-831 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ORTONVILLE MI
2013-02-01 321-732 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - FL 937C ORLANDO FL
2013-02-01 323-498 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J LSAN DA 14 CA
2013-02-01 402-347 0–9 XXXall 10 · 5 holders which blocks → PBN, LLC - NE 975G NORFOLK NE
2013-02-01 512-822 0–9 XXXall 10 · 3 holders which blocks → FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D AUSTIN TX
2013-02-01 626-427 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ALHAMBRA CA
2013-02-01 636-429 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF MISSOURI, LLC - MO 225F EUREKA MO
2013-02-01 651-413 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 STILLWATER MN
2013-02-01 661-441 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J PLDL PLDL CA
2013-02-01 661-471 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J LANCASTER CA
2013-02-01 714-294 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J ANAHEIM CA
2013-02-01 714-559 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SANTA ANA CA
2013-02-01 720-380 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2013-02-01 734-204 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DEXTER MI
2013-02-01 734-594 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DEXTER MI
2013-02-01 747-221 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 GLENDALE CA
2013-02-01 747-233 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J VAN NUYS CA
2013-02-01 763-307 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 CAMBRIDGE MN
2013-02-01 818-452 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J NO HOLLYWD CA
2013-02-01 909-330 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E ETIWANDA CA
2013-02-01 909-352 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E MARSHALL CA
2013-02-01 949-393 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SADLBK VLY CA
2013-01-31 229-433 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 VALDOSTA GA
2013-01-31 248-923 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J ROCHESTER MI
2013-01-31 469-503 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI TX
2013-01-31 506-948 not yet reported which blocks → Bell Mobility Aliant 329A Saint John —
2013-01-31 510-328 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2013-01-31 619-373 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J CHULAVISTA CA
2013-01-31 619-383 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J EL CAJON CA
2013-01-31 647-329 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 8377 Toronto —
2013-01-31 670-783 not yet reported which blocks → PTI PACIFICA INC. 387C SAIPAN —
2013-01-31 681-251 0XXX1XXX2XXX5XXX8XXX9XXX · 4 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - WV 489F MAYBEURY WV
2013-01-31 681-329 0XXX1XXX2XXX3XXX4XXX5XXX · 4 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - WV 489F COALWOOD WV
2013-01-31 709-948 not yet reported which blocks → Bell Mobility Aliant 329A St. John's —
2013-01-31 734-221 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J YPSILANTI MI
2013-01-31 760-573 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J OCSD OCSD CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.