Home / Area 423 / Prefix 721
Prefix Lookup

(423) 721 Phone Number Lookup

Research phone numbers under this exchange in Knoxville, Tennessee. Review carrier details, activity signals, and community caller feedback.

134number listings
0caller reports
8lookup pages

Phone Numbers in This Prefix

Browse numbers in this exchange and open any listing to view caller details, spam signals, and community feedback. Showing 37–54 of 134 listings for this prefix.

Low activity Wireless

(423) 721-2298

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
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Low activity Wireless

(423) 721-2318

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2338

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2358

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2378

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2398

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2418

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2438

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2458

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2478

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2498

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2518

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2538

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2558

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2578

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2598

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2618

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing
Low activity Wireless

(423) 721-2638

Knoxville, Tennessee

  • Carrier: United States Cellular Corp. - Tennessee
  • Exchange: 423-721
  • Report type: Reverse lookup profile
View listing

About this prefix

Area code 423 prefix 721 is organized as a reverse lookup section for Knoxville, Tennessee. The page combines location metadata, carrier information, line type, number listings, and community activity in one place.

Public URLs use the exchange format 423-721, while each listing still maps back to the correct area code and prefix structure.