{"classifier_version":"1.4.0","documentation":"https://rirtracker.com/api/","disclaimer":"This site independently analyzes publicly available Internet number-resource records. It is not affiliated with or endorsed by ARIN, the RIPE NCC, APNIC, LACNIC, AFRINIC, the Number Resource Organization (NRO), or any other Regional Internet Registry. Classifications and hold-expiration dates are evidence-based interpretations and do not constitute confirmation that a resource is available for issuance or transfer.","resource":"144.168.128.0/17","resource_type":"ipv4","page":"https://rirtracker.com/ip/144.168.128.0-144.168.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2023-03-30)"},"current_holder":{"rir":"ARIN","org":"Amazon.com, Inc.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":31079,"date":"2023-03-30T11:36:55Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"B2 Net Solutions Inc.","recipient_org":"Amazon.com, Inc.","range":"144.168.128.0/17","log":"ARIN"}],"events":[{"event_id":"a6a12a9e5cd1881b","registry":"ARIN","report_date":"2023-03-30","source":"arin_issued","raw_action":"ADD","raw_line":"Add 144.168.128.0-144.168.255.255","resource_type":"ipv4","resource":"144.168.128.0/17","start":"144.168.128.0","end":"144.168.255.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"B2 Net Solutions Inc.","recipient_organization":"Amazon.com, Inc.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:39+00:00","page":"https://rirtracker.com/ip/144.168.128.0-144.168.255.255/#e-a6a12a9e5cd1881b","report_page":"https://rirtracker.com/arin/reports/2023-03-30/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/144.168.128.0-144.168.255.255.json","explanation":"ARIN's transfer log records a transfer from B2 Net Solutions Inc. (ARIN) to Amazon.com, Inc. (ARIN) on 2023-03-30 11:36 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2023-March/005221.html","retrieved_at":"2026-10-12T18:42:06+00:00","summary":"ARIN-Issued report for 2023-03-30: \"Add 144.168.128.0-144.168.255.255\""},{"type":"transfer","url":"https://ftp.arin.net/pub/stats/arin/transfers/transfers_latest.json","retrieved_at":"2026-10-13T13:57:20+00:00","summary":"Transfer log: RESOURCE_TRANSFER on 2023-03-30 11:36 UTC, B2 Net Solutions Inc. (ARIN) to Amazon.com, Inc. (ARIN); resources moved: 144.168.128.0/17"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20230329.gz","retrieved_at":"2026-10-12T23:18:10+00:00","summary":"ARIN delegated statistics 2023-03-29 (produced 2023-03-29T13:00:11+00:00), before the report: allocated (dated 2015-09-02)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2023/delegated-arin-extended-20230331.gz","retrieved_at":"2026-10-12T23:18:14+00:00","summary":"ARIN delegated statistics 2023-03-31 (produced 2023-03-31T13:00:10+00:00), after the report: allocated (dated 2023-03-30)"}]},{"event_id":"c945d4818d5ed2b3","registry":"ARIN","report_date":"2015-09-02","source":"arin_issued","raw_action":"ADD","raw_line":"Add 144.168.128.0-144.168.255.255","resource_type":"ipv4","resource":"144.168.128.0/17","start":"144.168.128.0","end":"144.168.255.255","classification":"UNRESOLVED","classification_label":"Unresolved change","confidence":"OBSERVED_ONLY","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Inventory effect unknown","inventory_effect_code":"UNKNOWN","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:28+00:00","page":"https://rirtracker.com/ip/144.168.128.0-144.168.255.255/#e-c945d4818d5ed2b3","report_page":"https://rirtracker.com/arin/reports/2015-09-02/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/144.168.128.0-144.168.255.255.json","explanation":"No transfer record matches. ARIN's statistics show it not listed on 2015-09-01 and allocated (dated 2015-09-02) on 2015-09-03. It wasn't in ARIN's statistics before, so it wasn't ARIN's unissued inventory; it may have come from another registry in a transfer not yet in the log.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2015-September/002456.html","retrieved_at":"2026-10-12T18:38:56+00:00","summary":"ARIN-Issued report for 2015-09-02: \"Add 144.168.128.0-144.168.255.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2015/delegated-arin-extended-20150901.gz","retrieved_at":"2026-10-12T20:57:55+00:00","summary":"ARIN delegated statistics 2015-09-01 (produced 2015-09-01T05:05:28+00:00), before the report: not listed"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2015/delegated-arin-extended-20150903.gz","retrieved_at":"2026-10-12T20:58:00+00:00","summary":"ARIN delegated statistics 2015-09-03 (produced 2015-09-03T05:05:25+00:00), after the report: allocated (dated 2015-09-02)"}]}],"classification_history":{"a6a12a9e5cd1881b":[{"raw_change_id":180728,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:58:15+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from B2 Net Solutions Inc. (ARIN) to Amazon.com, Inc. (ARIN) on 2023-03-30 11:36 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":180728,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:25+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from B2 Net Solutions Inc. (ARIN) to Amazon.com, Inc. (ARIN) on 2023-03-30 11:36 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":180728,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:50:14+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from B2 Net Solutions Inc. (ARIN) to Amazon.com, Inc. (ARIN) on 2023-03-30 11:36 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":180728,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:39+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from B2 Net Solutions Inc. (ARIN) to Amazon.com, Inc. (ARIN) on 2023-03-30 11:36 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}],"c945d4818d5ed2b3":[{"raw_change_id":139427,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.0","classified_at":"2026-10-13T03:33:39+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not listed on 2015-09-01 and allocated (dated 2015-09-02) on 2015-09-03. It wasn't in ARIN's statistics before, so it wasn't ARIN's unissued inventory; it may have come from another registry in a transfer not yet in the log."},{"raw_change_id":139427,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:46+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not listed on 2015-09-01 and allocated (dated 2015-09-02) on 2015-09-03. It wasn't in ARIN's statistics before, so it wasn't ARIN's unissued inventory; it may have come from another registry in a transfer not yet in the log."},{"raw_change_id":139427,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:23+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not listed on 2015-09-01 and allocated (dated 2015-09-02) on 2015-09-03. It wasn't in ARIN's statistics before, so it wasn't ARIN's unissued inventory; it may have come from another registry in a transfer not yet in the log."},{"raw_change_id":139427,"classification_code":"UNRESOLVED","confidence":"OBSERVED_ONLY","classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:28+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it not listed on 2015-09-01 and allocated (dated 2015-09-02) on 2015-09-03. It wasn't in ARIN's statistics before, so it wasn't ARIN's unissued inventory; it may have come from another registry in a transfer not yet in the log."}]},"arin_statistics_now":{"status":"allocated (dated 2023-03-30)"}}