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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2011-10-25 587-377 not yet reported which blocks → Bell Mobility 6574 Red Deer —
2011-10-25 587-516 not yet reported which blocks → TELUS Mobility 8301 Slave Lake —
2011-10-25 587-998 not yet reported which blocks → TELUS Mobility 8301 Calgary —
2011-10-25 612-212 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TWINCITIES MN
2011-10-25 803-219 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C BLACKVILLE SC
2011-10-25 864-210 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C HONEA PATH SC
2011-10-25 870-206 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 JONESBORO AR
2011-10-25 902-210 not yet reported which blocks → TELUS Mobility 8303 Halifax —
2011-10-25 902-329 not yet reported which blocks → TELUS Mobility 8303 Halifax —
2011-10-24 224-541 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ILLINOIS BELL TEL CO 9329 GRAYSLAKE IL
2011-10-24 318-321 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ALEXANDRIA LA
2011-10-24 415-426 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2011-10-24 415-432 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC CNTRL CA
2011-10-24 443-931 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 BALTIMORE MD
2011-10-24 626-269 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LA PUENTE CA
2011-10-24 662-894 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 6 holders which blocks → LEVEL 3 TELECOM OF MISSISSIPPI, LLC - MS 220C LULA MS
2011-10-24 903-307 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SULPHURSPG TX
2011-10-21 205-207 0–9 XXXall 10 · 2 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 SPRINGVL AL
2011-10-21 217-207 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C ST JOSEPH IL
2011-10-21 318-314 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 ALEXANDRIA LA
2011-10-21 318-317 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SHREVEPORT LA
2011-10-21 318-507 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SHREVEPORT LA
2011-10-21 331-205 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 AURORA IL
2011-10-21 408-630 0–9 XXXall 10 · 4 holders which blocks → PACIFIC BELL 9740 SNJS SOUTH CA
2011-10-21 408-643 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SNJS NORTH CA
2011-10-21 438-935 not yet reported which blocks → TELUS Mobility 8303 Montreal —
2011-10-21 504-407 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWORLEANS LA
2011-10-21 581-231 not yet reported which blocks → TELUS Mobility 8303 Fermont —
2011-10-21 615-570 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J DICKSON TN
2011-10-21 647-769 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2011-10-21 709-284 not yet reported which blocks → Bragg Communications Inc. 4878 Long Pond —
2011-10-21 709-286 not yet reported which blocks → Bragg Communications Inc. 4878 Freshwater —
2011-10-21 709-287 not yet reported which blocks → Bragg Communications Inc. 4878 Gander —
2011-10-21 709-289 not yet reported which blocks → Bragg Communications Inc. 4878 Corner Brook —
2011-10-21 709-358 not yet reported which blocks → Bragg Communications Inc. 4878 Grand Falls —
2011-10-21 928-319 2XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DILKON AZ
2011-10-21 928-489 0XXX1XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → SMITH BAGLEY INC. DBA CELLULAR ONE OF NE ARIZONA 4146 KAYENTA AZ
2011-10-21 937-240 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F BELLE CTR OH
2011-10-20 225-239 0–9 XXXall 10 · 5 holders which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2011-10-20 318-319 0–9 XXXall 10 · 6 holders which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 ALEXANDRIA LA
2011-10-20 501-313 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J LITTLEROCK AR
2011-10-20 504-316 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
2011-10-20 504-351 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
2011-10-20 504-385 0–9 XXXall 10 · 3 holders which blocks → VOICESTREAM GSM I, LLC 150C KENNER LA
2011-10-20 504-502 0–9 XXXall 10 · 4 holders which blocks → VOICESTREAM GSM I, LLC 150C KENNER LA
2011-10-20 504-607 0–9 XXXall 10 · 4 holders which blocks → VOICESTREAM GSM I, LLC 150C KENNER LA
2011-10-20 504-641 0–9 XXXall 10 · 3 holders which blocks → VOICESTREAM GSM I, LLC 150C KENNER LA
2011-10-20 506-378 not yet reported which blocks → Bell Mobility Aliant 329A Moncton —
2011-10-20 775-210 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SILVER SPG NV
2011-10-20 778-281 not yet reported which blocks → Bell Mobility 6574 Prince George —

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.