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| | <link:loc xlink:type="locator" xlink:href="idt-20200430.xsd#idt_NetTwoPhoneUnifiedCommunicationsAsServiceSegmentMember" xlink:label="loc_idtNetTwoPhoneUnifiedCommunicationsAsServiceSegmentMember"/> |
| | <link:presentationArc order="20" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaapSegmentDomain" xlink:to="loc_idtNetTwoPhoneUnifiedCommunicationsAsServiceSegmentMember" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_StatementGeographicalAxis" xlink:label="loc_srtStatementGeographicalAxis"/> |
| | <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaapScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable" xlink:to="loc_srtStatementGeographicalAxis" order="20"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srtSegmentGeographicalDomain"/> |
| | <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srtStatementGeographicalAxis" xlink:to="loc_srtSegmentGeographicalDomain" order="0"/> |
| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_US" xlink:label="loc_countryUS"/> |
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| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_GB" xlink:label="loc_countryGB"/> |
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| | <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_NL" xlink:label="loc_countryNL"/> |
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| | <link:loc xlink:type="locator" xlink:href="idt-20200430.xsd#idt_OtherCountriesMember" xlink:label="loc_idtOtherCountriesMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GeographicAreasRevenuesFromExternalCustomersAbstract" xlink:label="loc_us-gaapGeographicAreasRevenuesFromExternalCustomersAbstract"/> |
| | <link:presentationArc order="0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaapEntityWideInformationRevenueFromExternalCustomerLineItems" xlink:to="loc_us-gaapGeographicAreasRevenuesFromExternalCustomersAbstract" xlink:type="arc"/> |
| | <link:loc xlink:type="locator" xlink:href="idt-20200430.xsd#idt_RevenuesFromForeignCustomers" xlink:label="loc_idtRevenuesFromForeignCustomers"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaapRevenues"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems" xlink:label="loc_us-gaapEntityWideInformationRevenueFromExternalCustomerLineItems"/> |
| | <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaapScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable" xlink:to="loc_us-gaapEntityWideInformationRevenueFromExternalCustomerLineItems" order="200"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaapDerivativeInstrumentRiskAxis"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaapDerivativeContractTypeDomain"/> |
| | <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaapDerivativeInstrumentRiskAxis" xlink:to="loc_us-gaapDerivativeContractTypeDomain" order="0"/> |
| | <link:loc xlink:type="locator" xlink:href="idt-20200430.xsd#idt_ContractLiabilitiesMember" xlink:label="loc_idtContractLiabilitiesMember"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized" xlink:label="loc_us-gaapContractWithCustomerLiabilityRevenueRecognized"/> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalizedContractCostNetCurrent" xlink:label="loc_us-gaapCapitalizedContractCostNetCurrent"/> |
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| | </link:presentationLink> |
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| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeasesAbstract" xlink:label="loc_us-gaapLeasesAbstract"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseCost" xlink:label="loc_us-gaapOperatingLeaseCost"/> |
| | <link:presentationArc order="0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaapLeasesAbstract" xlink:to="loc_us-gaapOperatingLeaseCost" xlink:type="arc"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShortTermLeaseCost" xlink:label="loc_us-gaapShortTermLeaseCost"/> |
| | <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaapLeasesAbstract" xlink:to="loc_us-gaapShortTermLeaseCost" xlink:type="arc"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeaseCost" xlink:label="loc_us-gaapLeaseCost"/> |
| | <link:presentationArc order="20" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaapLeasesAbstract" xlink:to="loc_us-gaapLeaseCost" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashFlowOperatingActivitiesLesseeAbstract" xlink:label="loc_us-gaapCashFlowOperatingActivitiesLesseeAbstract"/> |
| | <link:presentationArc order="30" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaapLeasesAbstract" xlink:to="loc_us-gaapCashFlowOperatingActivitiesLesseeAbstract" xlink:type="arc"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasePayments" xlink:label="loc_us-gaapOperatingLeasePayments"/> |
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