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800 xxx xxx. Other numbers ... Fixed SMS 802 xxx xxx UAN (universal number) 804 xxx xxx VPN 806 xxx xxx VCC 808 xxx xxx VoIP 39x xxx xxx NDSI ...
3 Geographic number for fixed telephony services (area codes) 4 VoIP services. ... 800: Allocated for national toll-free services ...
In March 2024, AT&T confirmed the 2021 leak of contact information for over 7.6 million current users, as well as 65 million former ones. The leaked records may contain "full name, email address, mailing address, phone number, social security number, date of birth, AT&T account number and passcode". [184]
The VoIP E911 emergency-calling system associates a physical address with the calling party's telephone number. All VoIP providers that provide access to the public switched telephone network are required to implement E911, a service for which the subscriber may be charged. "VoIP providers may not allow customers to opt-out of 911 service."
That RFC also defines a SIP Parameters Internet Assigned Numbers Authority (IANA) registry to allow other RFC to provide more response codes. [1]: §27 [2] This list includes all the SIP response codes defined in IETF RFCs and registered in the SIP Parameters IANA registry as of 27 January 2023. This list also includes SIP response codes ...
1xx Special numbers 001 and 00xx Carrier selection codes 0x 2-digit geographic area codes 0xx 3-digit geographic area codes 0xxx 4-digit geographic area codes 0xxxx 5-digit geographic area codes 0x0 3-digit non-Geographic area codes (excluding 010) 0xx0 4-digit non-Geographic area codes (01x0, 0570, 0800, 0910, 0990)
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