SecurityAltIDSource (FIX tag 456)

StringFIX 4.4FIX 5.0 SP2

SecurityAltIDSource (tag 456) is a String field defined in FIX 4.4 and FIX 5.0 SP2. It appears in 59 message types, always optionally.

At a glance

Tag
456
Name
SecurityAltIDSource
Datatype
String
Dialects
FIX 4.4 and FIX 5.0 SP2
Messages
59

What the specification says

FIX 4.4

Identifies class or source of the SecurityAltID (455) value. Required if SecurityAltID is specified. Valid values: Same valid values as the SecurityIDSource (22) field

FIX 5.0 SP2

Identifies class or source of the SecurityAltID(455) value.

Descriptions are quoted from the FIX Orchestra sources under the Apache 2.0 licence.

A real message using tag 456

NewOrderSingle · FIX 4.4
TagFieldWire valueMeaning
8BeginStringFIX.4.4
9BodyLength165
35MsgTypeDOrder – Single
49SenderCompIDBOARTEAM
56TargetCompIDCOUNTERPARTY
34MsgSeqNum2
52SendingTime20240101-12:00:00.000
11ClOrdIDORD-10042
454NoSecurityAltID2 entries2repeating group
455SecurityAltIDEXAMPLE
456SecurityAltIDSourceEXAMPLE
455SecurityAltIDEXAMPLE
456SecurityAltIDSourceEXAMPLE
54Side1Buy
60TransactTime20240101-12:00:00.000
40OrdType1Market
10CheckSum168
Edit and decode it yourself

Shown with | separators for readability. On the wire FIX uses SOH (0x01), an invisible control byte — and because BodyLength and CheckSum are computed over the actual bytes, the two forms have different checksums. Both are valid and both decode here.

Open in the full decoder →

Generated from the FIX 4.4 dictionary and verified at build time: it parses and validates with no issues. Open the decoder to try your own message.

Where tag 456 appears

Requiredness is a property of the message, not of the field: the same tag can be optional in one message and conditionally required in another.

MessageMsgTypeFIX 4.4FIX 5.0 SP2Where in the message
AdjustedPositionReportBLOptionalinside InstrmtGrp › Instrument › SecAltIDGrp
Advertisement7ConditionalOptionalinside Instrument › SecAltIDGrp
AllocationInstructionJConditionalOptionalinside Instrument › SecAltIDGrp
AllocationInstructionAlertBMOptionalinside Instrument › SecAltIDGrp
AllocationReportASConditionalOptionalinside Instrument › SecAltIDGrp
AssignmentReportAWConditionalOptionalinside Instrument › SecAltIDGrp
CollateralAssignmentAYConditionalOptionalinside Instrument › SecAltIDGrp
CollateralInquiryBBConditionalOptionalinside Instrument › SecAltIDGrp
CollateralInquiryAckBGConditionalOptionalinside Instrument › SecAltIDGrp
CollateralReportBAConditionalOptionalinside Instrument › SecAltIDGrp
CollateralRequestAXConditionalOptionalinside Instrument › SecAltIDGrp
CollateralResponseAZConditionalOptionalinside Instrument › SecAltIDGrp
ConfirmationAKConditionalOptionalinside Instrument › SecAltIDGrp
ContraryIntentionReportBOOptionalinside Instrument › SecAltIDGrp
CrossOrderCancelReplaceRequesttConditionalOptionalinside Instrument › SecAltIDGrp
CrossOrderCancelRequestuConditionalOptionalinside Instrument › SecAltIDGrp
DerivativeSecurityListAAConditionalOptionalinside RelSymDerivSecGrp › Instrument › SecAltIDGrp
DerivativeSecurityListUpdateReportBROptionalinside RelSymDerivSecUpdGrp › Instrument › SecAltIDGrp
DontKnowTradeQConditionalOptionalinside Instrument › SecAltIDGrp
EmailCConditionalOptionalinside InstrmtGrp › Instrument › SecAltIDGrp
ExecutionAcknowledgementBNOptionalinside Instrument › SecAltIDGrp
ExecutionReport8ConditionalOptionalinside Instrument › SecAltIDGrp
IOI6ConditionalOptionalinside Instrument › SecAltIDGrp
ListStrikePricemConditionalOptionalinside InstrmtStrkPxGrp › Instrument › SecAltIDGrp
MarketDataIncrementalRefreshXConditionalOptionalinside MDIncGrp › Instrument › SecAltIDGrp
MarketDataRequestVConditionalOptionalinside InstrmtMDReqGrp › Instrument › SecAltIDGrp
MarketDataSnapshotFullRefreshWConditionalOptionalinside Instrument › SecAltIDGrp
MassQuoteiConditionalOptionalinside QuotSetGrp › QuotEntryGrp › Instrument › SecAltIDGrp
MassQuoteAcknowledgementbConditionalOptionalinside QuotSetAckGrp › QuotEntryAckGrp › Instrument › SecAltIDGrp
MultilegOrderCancelReplaceACConditionalOptionalinside Instrument › SecAltIDGrp
NewOrderCrosssConditionalOptionalinside Instrument › SecAltIDGrp
NewOrderListEConditionalOptionalinside ListOrdGrp › Instrument › SecAltIDGrp
NewOrderMultilegABConditionalOptionalinside Instrument › SecAltIDGrp
NewOrderSingleDConditionalOptionalinside Instrument › SecAltIDGrp
NewsBConditionalOptionalinside InstrmtGrp › Instrument › SecAltIDGrp
OrderCancelReplaceRequestGConditionalOptionalinside Instrument › SecAltIDGrp
OrderCancelRequestFConditionalOptionalinside Instrument › SecAltIDGrp
OrderMassActionReportBZOptionalinside Instrument › SecAltIDGrp
OrderMassActionRequestCAOptionalinside Instrument › SecAltIDGrp
OrderMassCancelReportrConditionalOptionalinside Instrument › SecAltIDGrp
OrderMassCancelRequestqConditionalOptionalinside Instrument › SecAltIDGrp
OrderMassStatusRequestAFConditionalOptionalinside Instrument › SecAltIDGrp
OrderStatusRequestHConditionalOptionalinside Instrument › SecAltIDGrp
PositionMaintenanceReportAMConditionalOptionalinside Instrument › SecAltIDGrp
PositionMaintenanceRequestALConditionalOptionalinside Instrument › SecAltIDGrp
PositionReportAPConditionalOptionalinside Instrument › SecAltIDGrp
QuoteSConditionalOptionalinside Instrument › SecAltIDGrp
QuoteCancelZConditionalOptionalinside QuotCxlEntriesGrp › Instrument › SecAltIDGrp
QuoteRequestRConditionalOptionalinside QuotReqGrp › Instrument › SecAltIDGrp
QuoteRequestRejectAGConditionalOptionalinside QuotReqRjctGrp › Instrument › SecAltIDGrp
QuoteResponseAJConditionalOptionalinside Instrument › SecAltIDGrp
QuoteStatusReportAIConditionalOptionalinside Instrument › SecAltIDGrp
QuoteStatusRequestaConditionalOptionalinside Instrument › SecAltIDGrp
RFQRequestAHConditionalOptionalinside RFQReqGrp › Instrument › SecAltIDGrp
RequestForPositionsANConditionalOptionalinside Instrument › SecAltIDGrp
RequestForPositionsAckAOConditionalOptionalinside Instrument › SecAltIDGrp
SecurityDefinitiondConditionalOptionalinside Instrument › SecAltIDGrp
SecurityDefinitionRequestcConditionalOptionalinside Instrument › SecAltIDGrp
SecurityDefinitionUpdateReportBPOptionalinside Instrument › SecAltIDGrp
SecurityListyConditionalOptionalinside SecListGrp › Instrument › SecAltIDGrp
SecurityListRequestxConditionalOptionalinside Instrument › SecAltIDGrp
SecurityListUpdateReportBKOptionalinside SecLstUpdRelSymGrp › Instrument › SecAltIDGrp
SecurityStatusfConditionalOptionalinside Instrument › SecAltIDGrp
SecurityStatusRequesteConditionalOptionalinside Instrument › SecAltIDGrp
SettlementObligationReportBQOptionalinside SettlObligationInstructions › Instrument › SecAltIDGrp
StreamAssignmentReportCDOptionalinside StrmAsgnRptGrp › StrmAsgnRptInstrmtGrp › Instrument › SecAltIDGrp
StreamAssignmentRequestCCOptionalinside StrmAsgnReqGrp › StrmAsgnReqInstrmtGrp › Instrument › SecAltIDGrp
TradeCaptureReportAEConditionalOptionalinside Instrument › SecAltIDGrp
TradeCaptureReportAckARConditionalOptionalinside Instrument › SecAltIDGrp
TradeCaptureReportRequestADConditionalOptionalinside Instrument › SecAltIDGrp
TradeCaptureReportRequestAckAQConditionalOptionalinside Instrument › SecAltIDGrp
TradingSessionStatushOptionalinside Instrument › SecAltIDGrp

Wire format

Free-form text. Any byte except the SOH separator is legal, so values are not trimmed or case-folded on the wire. @boarteam/fix keeps the value as a string; format rules are checked by validate(), which reports validate/invalid-value rather than throwing.

Read tag 456 in TypeScript

decode.tsts
import { createFixEngine } from "@boarteam/fix";import { dictionary } from "@boarteam/fix-dict-fix44";const fix = createFixEngine(dictionary);const { message, issues } = fix.parse(raw);const field = message.fields[456];field?.name;   // "SecurityAltIDSource"field?.raw;    // the verbatim wire stringfield?.value;  // coerced to a string

Other String fields

Decode this in your own code

The same engine that produced the decoded example above is an Apache-2.0 npm package with zero runtime dependencies. It runs in Node and in the browser, and parse() returns problems as data instead of throwing.

npm i @boarteam/fix @boarteam/fix-dict-fix44