{"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":"157.241.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/157.241.0.0-157.241.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2021-03-23)"},"current_holder":{"rir":"ARIN","org":"Amazon Technologies Inc.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":24148,"date":"2021-03-23T20:19:51Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Transform SR Holding Management LLC","recipient_org":"Amazon Technologies Inc.","range":"157.241.0.0/16","log":"ARIN"},{"id":23937,"date":"2021-02-26T19:10:52Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Sears Technology Services","recipient_org":"Transform SR Holding Management LLC","range":"157.241.0.0/16","log":"ARIN"}],"events":[{"event_id":"a1c17fd2d9756500","registry":"ARIN","report_date":"2021-03-23","source":"arin_issued","raw_action":"ADD","raw_line":"Add 157.241.0.0-157.241.255.255","resource_type":"ipv4","resource":"157.241.0.0/16","start":"157.241.0.0","end":"157.241.255.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Transform SR Holding Management LLC","recipient_organization":"Amazon Technologies Inc.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:06+00:00","page":"https://rirtracker.com/ip/157.241.0.0-157.241.255.255/#e-a1c17fd2d9756500","report_page":"https://rirtracker.com/arin/reports/2021-03-23/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/157.241.0.0-157.241.255.255.json","explanation":"ARIN's transfer log records a transfer from Transform SR Holding Management LLC (ARIN) to Amazon Technologies Inc. (ARIN) on 2021-03-23 20:19 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/2021-March/004484.html","retrieved_at":"2026-10-12T18:41:15+00:00","summary":"ARIN-Issued report for 2021-03-23: \"Add 157.241.0.0-157.241.255.255\""},{"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 2021-03-23 20:19 UTC, Transform SR Holding Management LLC (ARIN) to Amazon Technologies Inc. (ARIN); resources moved: 157.241.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20210322.gz","retrieved_at":"2026-10-12T22:40:02+00:00","summary":"ARIN delegated statistics 2021-03-22 (produced 2021-03-22T14:00:14+00:00), before the report: assigned (dated 1992-02-04)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20210324.gz","retrieved_at":"2026-10-12T22:40:08+00:00","summary":"ARIN delegated statistics 2021-03-24 (produced 2021-03-24T14:00:12+00:00), after the report: allocated (dated 2021-03-23)"}]},{"event_id":"7b2f3ed60a5c39f4","registry":"ARIN","report_date":"2021-02-26","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"157.241.0.0/16","start":"157.241.0.0","end":"157.241.255.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Sears Technology Services","recipient_organization":"Transform SR Holding Management LLC","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:55+00:00","page":"https://rirtracker.com/ip/157.241.0.0-157.241.255.255/#e-7b2f3ed60a5c39f4","report_page":"https://rirtracker.com/arin/reports/2021-02-26/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/157.241.0.0-157.241.255.255.json","observed":"Merger/acquisition: Sears Technology Services (ARIN) to Transform SR Holding Management LLC (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Sears Technology Services (ARIN) to Transform SR Holding Management LLC (ARIN) on 2021-02-26 19:10 UTC. The registration changed hands; it is not a new allocation from ARIN. ARIN-Issued and ARIN's statistics don't show this change; only the transfer log records it.","evidence":[{"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: MERGER_ACQUISITION on 2021-02-26 19:10 UTC, Sears Technology Services (ARIN) to Transform SR Holding Management LLC (ARIN); resources moved: 157.241.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20210225.gz","retrieved_at":"2026-10-12T22:38:46+00:00","summary":"ARIN delegated statistics 2021-02-25 (produced 2021-02-25T15:00:13+00:00), before the report: assigned (dated 1992-02-04)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20210227.gz","retrieved_at":"2026-10-12T22:38:55+00:00","summary":"ARIN delegated statistics 2021-02-27 (produced 2021-02-27T15:00:13+00:00), after the report: assigned (dated 1992-02-04)"}]}],"classification_history":{"a1c17fd2d9756500":[{"raw_change_id":170356,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:51:41+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Transform SR Holding Management LLC (ARIN) to Amazon Technologies Inc. (ARIN) on 2021-03-23 20:19 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":170356,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:00+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Transform SR Holding Management LLC (ARIN) to Amazon Technologies Inc. (ARIN) on 2021-03-23 20:19 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":170356,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:46+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Transform SR Holding Management LLC (ARIN) to Amazon Technologies Inc. (ARIN) on 2021-03-23 20:19 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":170356,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:06+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Transform SR Holding Management LLC (ARIN) to Amazon Technologies Inc. (ARIN) on 2021-03-23 20:19 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}],"7b2f3ed60a5c39f4":[{"raw_change_id":562885,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:55+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Sears Technology Services (ARIN) to Transform SR Holding Management LLC (ARIN) on 2021-02-26 19:10 UTC. The registration changed hands; it is not a new allocation from ARIN. ARIN-Issued and ARIN's statistics don't show this change; only the transfer log records it."}]},"arin_statistics_now":{"status":"allocated (dated 2021-03-23)"}}