| Hex | Dec | Description |
|---|
| 000 | 0 | Successfully Delivered |
| 001 | 1 | Absent subscriber (network cannot contact subscriber) |
| 002 | 2 | Handset memory exceeded |
| 003 | 3 | Equipment protocol error |
| 004 | 4 | Equipment not equipped with short-message capability |
| 005 | 5 | Unknown service centre (destination MSC) |
| 006 | 6 | Service centre congestion (Too much inbound traffic at destination network) |
| 007 | 7 | Invalid SME address |
| 008 | 8 | Subscriber is not a SC subscriber (Number belongs to a different destination network but HLR is not updated) |
| 009 | 9 | Unknown subscriber (IMSI is unknown in the HLR) |
| 00A | 10 | Illegal subscriber (The mobile station failed authentication) |
| 00B | 11 | Teleservice not provisioned (Mobile subscription identified by the MSISDN number does not include the short message service) |
| 00C | 12 | Illegal equipment (IMEI check failed, blacklisted or not whitelisted) |
| 00D | 13 | Call barred (Operator barred the MSISDN number) |
| 00E | 14 | Facility not supported (VLR in the PLMN does not support MT short message service) |
| 00F | 15 | Subscriber busy for MT short message |
| 010 | 16 | System failure |
| 011 | 17 | Message waiting list at HLR is full |
| 012 | 18 | Data missing |
| 013 | 19 | Unexpected data value |
| 014 | 20 | Resource limitation at peer / destination network |
| 015 | 21 | TCAP error (Duplicate invoke ID) |
| 016 | 22 | TCAP error (Not supported service) |
| 017 | 23 | TCAP error (Mistyped parameter) |
| 018 | 24 | TCP error (Resource Limitation) |
| 019 | 25 | TCAP error (TCAP initiating release) |
| 01A | 26 | TCAP error (Unexpected response from peer) |
| 01B | 27 | TCAP error (Service completion failure) |
| 01C | 28 | TCAP error (No response from peer) |
| 01D | 29 | TCAP error (Invalid response received) |
| 01E | 30 | Unidentified subscriber |
| 01F | 31 | Service temporary not available |
| 020 | 32 | Illegal error code |
| 021 | 33 | Network timeout |
| 022 | 34 | Operation Barred (From the MNO) |
| 023 | 35 | Delivery fail |
| 024 | 36 | Error in MS |
| 025 | 37 | PLMN system failure |
| 026 | 38 | HLR system failure |
| 027 | 39 | VLR system failure |
| 028 | 40 | Controlling MSC failure (Error in the MSC where the user is located) |
| 029 | 41 | Visited MSC failure (Error in the visited MSC) |
| 02A | 42 | MNP other operator not allowed (MSISDN is ported, delivery via this SMSC not permitted) |
| 02B | 43 | Subscriber temporarily unreachable (While roaming) |
| 02C | 44 | Message store busy |
| 02D | 45 | SME Interface busy |
| 02E | 46 | Closed user group reject |
| 02F | 47 | Network failure |
| 030 | 48 | Deferred Delivery (Message has not been delivered and is part of a deferred delivery schedule) |
| 031 | 49 | Error getting route |
| 032 | 50 | Insufficient credit |
| 033 | 51 | Rejected Destination |
| 034 | 52 | Rejected Unknown Reason |
| 035 | 53 | Rejected due to routing issue |
| 036 | 54 | Rejected due to blocking issue |
| 037 | 55 | Rejected due to no price |
| 038 | 56 | Rejected due to not enough credits |
| 039 | 57 | Rejected due to spam filter |
| 03A | 58 | Rejected due to flooding |
| 03B | 59 | UNKNOWN TCType,SMS |
| 03C | 60 | UNKNOWN TCType,SRI |
| 03E | 62 | Failure due to submission towards AA19 destination |
| 03D | 61 | UNKNOWN |
| 03F | 63 | Sent to SME but unable to confirm |
| 040 | 64 | Replaced at the SMSC |
| 041 | 65 | Quality service not available |
| 042 | 66 | Error in SMSC |
| 043 | 67 | Rejected by operator due to validity period expiry |
| 044 | 68 | Intermediate state notification that the message has not yet been delivered due to a phone related problem but is being retried. |
| 045 | 69 | Cannot determine whether this message has been delivered or has failed due to lack of final delivery state information from the operator. |
| 046 | 70 | Specific content is not permitted on the network / shortcode |
| 047 | 71 | Subscriber cannot receive adult content because of a parental lock |
| 048 | 72 | Failure due to ported combinations being unreachable. |
| 049 | 73 | Roaming subscriber. |
| 04A | 74 | Failure due to ported combinations being blocked for client (Client has been blacklisted from the ported destination). |
| 04B | 75 | Abort from HLR |
| 04C | 76 | Source address is blacklisted or not supported |
| 04D | 77 | Operation barred |
| 04E | 78 | Facility not provided |
| 04F | 79 | Invalid absolute validity period |
| 050 | 80 | SMS center received |
| 051 | 81 | Invalid PDU format |
| 052 | 82 | Local Cancel (Temporary problem / Lost reach) |
| 053 | 83 | Rejected due to duplicate |
| 054 | 84 | Maximum Connection Reached |
| 055 | 85 | Information Not Available |
| 056 | 86 | Message waiting list full |
| 057 | 87 | Short Term Denial |
| 058 | 88 | Expired due to no response from supplier |
| 059 | 89 | message replaced by SMSC |
| 0EC | 236 | PSMS Unknown subscriber |
| 05A | 90 | congestion at subscriber |
| 05B | 91 | service rejected |
| 05C | 92 | Error in SME |
| 05D | 93 | Remote procedure error |
| 05E | 94 | Connection rejected by SME |
| 05F | 95 | SM deleted by the sender |
| 060 | 96 | SM deleted by SMSC Admin |
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