The ITU-T, IETF and EU regulatory documents behind every number we provision and every call we route. Stable anchors per section so external sources can cite directly.
E.164 is the global numbering recommendation: a country code (1-3 digits) followed by the national subscriber number, with a maximum total length of 15 digits. Numbers are written with a leading + sign in their canonical, internationally-dialable form. Every number sold by GlobalXess is provisioned in conformance with E.164 and the local national numbering plan derived from it.
The +800 international freephone range is defined in ITU-T E.169 and administered by the ITU-T TSB. UIFNs work across multiple originating countries by negotiation with the originating operator in each country. GlobalXess provisions UIFN allocations directly with our European carrier interconnects and configures the originating-country reach per allocation.
E.212 defines the IMSI structure (MCC + MNC + MSIN) used to identify mobile subscribers on a mobile network. While E.212 sits below the consumer-visible numbering layer, it is what determines whether a given mobile number can roam, and which operator is contractually responsible for service quality.
SIP is the IETF signalling protocol used to set up, modify and tear down voice and video sessions over IP. RFC 3261 is the base specification; RFC 3263 covers DNS-based locating, RFC 3265 covers eventing, and RFC 4475 documents many of the corner-case torture-test conditions a carrier-grade SIP stack has to handle. GlobalXess SIP trunks support TLS for signalling and can be configured for SRTP on the media leg.
RTP carries the actual voice media on a SIP call. SRTP is the encrypted variant: the same payload, with AES-CTR for confidentiality and HMAC-SHA1 for authentication. Encryption is offered as a customer-selectable option on every GlobalXess SIP trunk and freephone allocation; the default for public-internet trunks is TLS for signalling and SRTP for media.
ENUM expresses the mapping from an E.164 number to a Uniform Resource Identifier (typically a SIP URI) using DNS NAPTR records under the e164.arpa zone, or under a private operator zone for inter-carrier routing. GlobalXess uses an internal ENUM tree to keep routing decisions consistent between the API, the portal and the live SIP infrastructure.
STIR (Secure Telephone Identity Revisited) is the IETF specification for cryptographically signing the originating CLI of a call so a receiving network can verify the caller actually controls the number. SHAKEN is the operational framework that wraps STIR for use between US carriers; equivalent regimes are rolling out in the UK, EU and Australia. GlobalXess two-way voice numbers are designed so the CLI presented on outbound calls is the same number you bought, with provider-level attestation, so your traffic carries the highest available STIR/SHAKEN trust level on the receiving network.
The EECC consolidates the EU regulatory framework for electronic-communications service providers: end-user rights, numbering, emergency services, security obligations, and CLI presentation rules. Article 97 of the EECC requires Member States to ensure that the CLI presented on outbound calls is one the originating party can reasonably be associated with, and gives Member States the authority to block or filter calls where it is not. GlobalXess (as Global Premium Telecom B.V.) is notified to the Dutch regulator (ACM) under the EECC.
ETSI TS 124 229 is the European profile of SIP for IP Multimedia Subsystem (IMS) deployments. It pins down vendor-interoperable behaviour for things the base RFC 3261 leaves underspecified - supplementary services, P-headers for billing and identity, and Trace-Info for SLA evidence. GlobalXess interconnects support the relevant subset where the partner carrier requires it.
Adopted by BEREC in 2024 and translated into national implementation by Dutch ACM, German BNetzA and several other regulators. The recommendation requires originating networks to filter outbound calls that present a CLI from outside the operator's allocated ranges, unless the originating party has demonstrably authorised the use. GlobalXess two-way voice product is designed against this rule: the CLI on every outbound call is a number the customer demonstrably controls.
Every GlobalXess country leaf is provisioned against the local national numbering plan published by the national regulator. Examples: ACM (Netherlands), Ofcom (United Kingdom), BNetzA (Germany), ARCEP (France), Comreg (Ireland), FCC + USAC (United States). The coverage page links each country to the relevant local context where it materially affects what is offered - e.g. where mobile origination is forbidden on a particular range or where two-way voice requires additional regulatory paperwork.
