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 91–108 of 134 listings for this prefix.

Low activity Wireless

(423) 721-3378

Knoxville, Tennessee

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

(423) 721-3398

Knoxville, Tennessee

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

(423) 721-3418

Knoxville, Tennessee

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

(423) 721-3438

Knoxville, Tennessee

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

(423) 721-3458

Knoxville, Tennessee

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

(423) 721-3478

Knoxville, Tennessee

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

(423) 721-3498

Knoxville, Tennessee

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

(423) 721-3518

Knoxville, Tennessee

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

(423) 721-3538

Knoxville, Tennessee

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

(423) 721-3558

Knoxville, Tennessee

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

(423) 721-3578

Knoxville, Tennessee

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

(423) 721-3598

Knoxville, Tennessee

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

(423) 721-3618

Knoxville, Tennessee

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

(423) 721-3638

Knoxville, Tennessee

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

(423) 721-3658

Knoxville, Tennessee

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

(423) 721-3678

Knoxville, Tennessee

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

(423) 721-3698

Knoxville, Tennessee

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

(423) 721-3718

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.