Direct-Inward-Dialing.PSTN.Number

sch:

• https://www.google.com/search?q=direct+inward+dialing
• https://www.google.com/search?q=USA+DID serp: https://www.callforwarding.com/usa-did-numbers/

wiki:

• https://en.wikipedia.org/wiki/Direct_inward_dial
• https://www.techtarget.com/whatis/definition/Direct-Inward-Dialing-DID
• https://www.twilio.com/docs/glossary/what-direct-inward-dialing-did

service:

• https://pstncall.com/price.html,
• https://www.localphone.com/incoming_numbers/united_states

feature / benefit:

• https://www.dialpad.com/glossary/direct-inward-dialing/

Marketplace

https://www.didww.com/virtual_numbers/United_States/