Central Office Exchange (NXX)

+1 (503) 608-XXXX

Serving Portland, Oregon, United States • Carrier: Tw Telecom Of Oregon LLC

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Looking for a specific 4-digit line in the +1 (503) 608 block? Enter the last 4 digits below to inspect caller data and spam reports immediately:

+1 (503) 608 -

Sample Active Numbers in this Prefix

Random representative sampling of telephone lines in the 1-503-608 block

503-608 0000
503-608 0260
503-608 0293
503-608 0378
503-608 0501
503-608 0744
503-608 0820
503-608 0995
503-608 2581
503-608 3048
503-608 3434
503-608 3469
503-608 3520
503-608 3569
503-608 3585
503-608 3638
503-608 4573
503-608 5091
503-608 5100
503-608 5111
503-608 5262
503-608 5401
503-608 5771
503-608 5831
503-608 6036
503-608 6613
503-608 6710
503-608 7166
503-608 7202
503-608 7390
503-608 7548
503-608 7597
503-608 8097
503-608 8448
503-608 8631
503-608 8644
503-608 8741
503-608 8747
503-608 9104
503-608 9472

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Telecommunication Guide for Exchange 503-608

Under the North American Numbering Plan (NANP), a standard 10-digit telephone number is organized as NPA-NXX-XXXX:

  • NPA (Numbering Plan Area): 503 identifies the geographic region within Oregon.
  • NXX (Central Office Exchange): 608 identifies the local telephone exchange or switching office serving Portland, Oregon.
  • XXXX (Subscriber Line Number): 10,000 distinct telephone lines (ranging from 0000 to 9999) are routed through this exchange.
How to Correctly Dial Numbers in this Prefix:
Call Origin Dialing Instructions Example
Local or Domestic (US/Canada) Dial 1 + 10-Digit Number 1 (503) 608-XXXX
Mobile / Wireless Devices Dial with international plus symbol +1 503 608 XXXX
International Callers Local exit code + 1 + Number 00 1 503 608 XXXX

Frequently Asked Questions

The registered service provider for this exchange is Tw Telecom Of Oregon LLC. Note that individual line numbers may have been transferred to other providers via Local Number Portability (LNP).
Calls from this prefix could originate from local businesses, hospitals, friends, or automated dialers. If you received an unsolicited call from an unknown party in this exchange, enter the full 4 digits in our search box above to check for community scam or telemarketer reports.

Exchange Information

  • Country: Unites States (+1)
  • State: Oregon
  • City / Area: Portland
  • Area Code: 503
  • Prefix (NXX): 608
  • Carrier: Tw Telecom Of Oregon LLC
  • Type: Landline
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Area Code 503

Explore other central office exchanges and municipalities covered by area code 503.

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