Extensible Authentication Protocol (EAP) 2005-05-02 2026-01-15 All requests for value assignment from the various number spaces below require "Specification Required". Requests must be specified in sufficient detail so that interoperability between independent implementations is possible. Possible forms of documentation include, but are not limited to, RFCs, the products of another standards body (e.g. 3GPP), or permanently and readily available vendor design notes. Specification Required Vesa Lehtovirta 0 Reserved 1 AKA-Challenge 2 AKA-Authentication-Reject 3 Unassigned 4 AKA-Synchronization-Failure 5 AKA-Identity 6-9 Unassigned 10 SIM-Start 11 SIM-Challenge 12 AKA-Notification and SIM-Notification 13 AKA-Reauthentication and SIM-Reauthentication 14 AKA-Client-Error and SIM-Client-Error 15-255 Unassigned Specification Required Vesa Lehtovirta 0 Reserved 1 AT_RAND 2 AT_AUTN 3 AT_RES 4 AT_AUTS 5 Unassigned 6 AT_PADDING 7 AT_NONCE_MT 8-9 Unassigned 10 AT_PERMANENT_ID_REQ 11 AT_MAC 12 AT_NOTIFICATION 13 AT_ANY_ID_REQ 14 AT_IDENTITY 15 AT_VERSION_LIST 16 AT_SELECTED_VERSION 17 AT_FULLAUTH_ID_REQ 18 Unassigned 19 AT_COUNTER 20 AT_COUNTER_TOO_SMALL 21 AT_NONCE_S 22 AT_CLIENT_ERROR_CODE 23 AT_KDF_INPUT 24 AT_KDF 25-127 Unassigned Specification Required Vesa Lehtovirta 128 Unassigned 129 AT_IV 130 AT_ENCR_DATA 131 Unassigned 132 AT_NEXT_PSEUDONYM 133 AT_NEXT_REAUTH_ID 134 AT_CHECKCODE 135 AT_RESULT_IND 136 AT_BIDDING 137 AT_IPMS_IND 3GPP TS 24.302 138 AT_IPMS_RES 3GPP TS 24.302 139 AT_TRUST_IND 3GPP TS 24.302 140 AT_SHORT_NAME_FOR_NETWORK 3GPP TS 24.302 141 AT_FULL_NAME_FOR_NETWORK 3GPP TS 24.302 142 AT_RQSI_IND 3GPP TS 24.139 143 AT_ RQSI_RES 3GPP TS 24.139 144 AT_TWAN_CONN_MODE 3GPP TS 24.302 12.6.0 145 AT_VIRTUAL_NETWORK_ID 146 AT_VIRTUAL_NETWORK_REQ 147 AT_CONNECTIVITY_TYPE 148 AT_HANDOVER_INDICATION 149 AT_HANDOVER_SESSION_ID 150 AT_MN_SERIAL_ID 151 AT_DEVICE_IDENTITY 3GPP TS 24.302 152 AT_PUB_ECDHE 153 AT_KDF_FS 154-255 Unassigned Specification Required Vesa Lehtovirta 0 General failure after authentication 1-1025 Unassigned 1026 User has been temporarily denied access 1027-1030 Unassigned 1031 User has not subscribed to the requested service 1032-16383 Unassigned 16384 General failure 16385 Certificate Replacement Required WBA IMSI Privacy Protection for Wi-Fi - Technical Specification v1.0 16386-32767 Unassigned 32768 Success 32769-65535 Unassigned Specification Required Vesa Lehtovirta 0 Unassigned 1 EAP-SIM Version 1 2-65535 Unassigned Specification Required Vesa Lehtovirta 0 "unable to process packet": a general error code 1 "unsupported version": the peer does not support any of the versions listed in AT_VERSION_LIST 2 "insufficient number of challenges": the peer's policy requires more triplets than the server included in AT_RAND 3 "RANDs are not fresh": the peer believes that the RAND challenges included in AT_RAND were not fresh 4-65535 Unassigned Specification Required Vesa Lehtovirta 0 Reserved 1 EAP-AKA' with CK'/IK' 2-65535 Unassigned Specification Required Jouni Korhonen 0 Reserved 1 Virt-Net-Req Type 2 Virt-Net-Req Sub type 3 Connectivity Type 4 Access Technology 5 Serial ID Type 6-127 Unassigned Specification Required Jouni Korhonen 0 Reserved 1 Single PDN connection 2 Multiple PDN connection. Can request Non-Seamless Wi- Fi Offload or EPC connectivity (see the Connectivity Type attribute below) 3-127 Unassigned Specification Required Jouni Korhonen 0 Reserved 1 PDN Type: IPv4 2 PDN Type: IPv6 3 PDN Type: IPv4v6 4-127 Unassigned Specification Required Jouni Korhonen 0 Reserved 1 Non-Seamless WLAN Offload (NSWO) 2 EPC PDN connectivity 3-127 Unassigned Specification Required Jouni Korhonen 0 Reserved 1 UTRAN 2 E-UTRAN 3-127 Unassigned Specification Required Jouni Korhonen 0 Reserved 1 IMEI 2 IMEISV 3-127 Unassigned Specification Required Jari Arkko, Peter Yee 0 Reserved 1 EAP-AKA' with ECDHE and X25519 2 EAP-AKA' with ECDHE and P-256 3-65535 Unassigned Dongwook Kim mailto:dongwook.kim&etsi.org 2026-01-15