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 109–126 of 134 listings for this prefix.

Low activity Wireless

(423) 721-3738

Knoxville, Tennessee

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

(423) 721-3758

Knoxville, Tennessee

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

(423) 721-3778

Knoxville, Tennessee

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

(423) 721-3798

Knoxville, Tennessee

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

(423) 721-3818

Knoxville, Tennessee

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

(423) 721-3838

Knoxville, Tennessee

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

(423) 721-3858

Knoxville, Tennessee

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

(423) 721-3878

Knoxville, Tennessee

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

(423) 721-3898

Knoxville, Tennessee

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

(423) 721-3918

Knoxville, Tennessee

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

(423) 721-3938

Knoxville, Tennessee

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

(423) 721-3958

Knoxville, Tennessee

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

(423) 721-3978

Knoxville, Tennessee

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

(423) 721-3998

Knoxville, Tennessee

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

(423) 721-4018

Knoxville, Tennessee

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

(423) 721-4038

Knoxville, Tennessee

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

(423) 721-4058

Knoxville, Tennessee

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

(423) 721-4078

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.