In HELD (RFC 5985), the LIS identifies the requesting device by the source IP address of the location request; other identifiers are out of scope of the base protocol.

Checked 2026-10-14

Vendor
not restricted
Product
not restricted
Subsystem
HELD
Deployment
any
Region
not restricted
Release range
RFC 5985
Checked
2026-10-14

Sources

Cite this note

APA

WarmTransfer. (2026, October 14). Network-based location for E911 across platforms: source note e911-network-location-discovery-held-ip-identifier. WarmTransfer. https://warmtransfer.net/knowledge/claims/e911-network-location-discovery-held-ip-identifier

BibTeX

@misc{warmtransfer-claim-e911-network-location-discovery-held-ip-identifier,
  title  = {Network-based location for E911 across platforms: source note e911-network-location-discovery-held-ip-identifier},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/e911-network-location-discovery-held-ip-identifier},
  note   = {Source note e911-network-location-discovery-held-ip-identifier, checked 2026-10-14}
}

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