{"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":"156.19.0.0/16","resource_type":"ipv4","page":"https://rirtracker.com/ip/156.19.0.0-156.19.255.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2017-06-26)"},"current_holder":{"rir":"ARIN","org":"Charter Communications","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":10186,"date":"2017-06-26T17:01:50Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Alcoa USA Corp.","recipient_org":"Charter Communications","range":"156.19.0.0/16","log":"ARIN"},{"id":9586,"date":"2017-05-30T20:34:57Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Aluminum Company of America-Warrick","recipient_org":"Alcoa USA Corp.","range":"156.19.0.0/16","log":"ARIN"}],"events":[{"event_id":"3e67085cdcd1ba3d","registry":"ARIN","report_date":"2017-06-26","source":"arin_issued","raw_action":"ADD","raw_line":"Add 156.19.0.0-156.19.255.255","resource_type":"ipv4","resource":"156.19.0.0/16","start":"156.19.0.0","end":"156.19.255.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Alcoa USA Corp.","recipient_organization":"Charter Communications","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:49+00:00","page":"https://rirtracker.com/ip/156.19.0.0-156.19.255.255/#e-3e67085cdcd1ba3d","report_page":"https://rirtracker.com/arin/reports/2017-06-26/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/156.19.0.0-156.19.255.255.json","explanation":"ARIN's transfer log records a transfer from Alcoa USA Corp. (ARIN) to Charter Communications (ARIN) on 2017-06-26 17:01 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/2017-June/003119.html","retrieved_at":"2026-10-12T18:39:40+00:00","summary":"ARIN-Issued report for 2017-06-26: \"Add 156.19.0.0-156.19.255.255\""},{"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 2017-06-26 17:01 UTC, Alcoa USA Corp. (ARIN) to Charter Communications (ARIN); resources moved: 156.19.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20170625.gz","retrieved_at":"2026-10-12T21:30:15+00:00","summary":"ARIN delegated statistics 2017-06-25 (produced 2017-06-25T05:24:15+00:00), before the report: assigned (dated 1993-04-08)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20170627.gz","retrieved_at":"2026-10-12T21:30:20+00:00","summary":"ARIN delegated statistics 2017-06-27 (produced 2017-06-27T05:29:48+00:00), after the report: allocated (dated 2017-06-26)"}]},{"event_id":"9518534eb33c5397","registry":"ARIN","report_date":"2017-05-30","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"156.19.0.0/16","start":"156.19.0.0","end":"156.19.255.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Aluminum Company of America-Warrick","recipient_organization":"Alcoa USA Corp.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:29+00:00","page":"https://rirtracker.com/ip/156.19.0.0-156.19.255.255/#e-9518534eb33c5397","report_page":"https://rirtracker.com/arin/reports/2017-05-30/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/156.19.0.0-156.19.255.255.json","observed":"Merger/acquisition: Aluminum Company of America-Warrick (ARIN) to Alcoa USA Corp. (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Aluminum Company of America-Warrick (ARIN) to Alcoa USA Corp. (ARIN) on 2017-05-30 20:34 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 2017-05-30 20:34 UTC, Aluminum Company of America-Warrick (ARIN) to Alcoa USA Corp. (ARIN); resources moved: 156.19.0.0/16"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20170529.gz","retrieved_at":"2026-10-12T21:28:53+00:00","summary":"ARIN delegated statistics 2017-05-29 (produced 2017-05-29T05:10:25+00:00), before the report: assigned (dated 1993-04-08)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2017/delegated-arin-extended-20170531.gz","retrieved_at":"2026-10-12T21:28:58+00:00","summary":"ARIN delegated statistics 2017-05-31 (produced 2017-05-31T05:10:14+00:00), after the report: assigned (dated 1993-04-08)"}]}],"classification_history":{"3e67085cdcd1ba3d":[{"raw_change_id":149720,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:38:34+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Alcoa USA Corp. (ARIN) to Charter Communications (ARIN) on 2017-06-26 17:01 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":149720,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:02+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Alcoa USA Corp. (ARIN) to Charter Communications (ARIN) on 2017-06-26 17:01 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":149720,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:42+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Alcoa USA Corp. (ARIN) to Charter Communications (ARIN) on 2017-06-26 17:01 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":149720,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:49+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Alcoa USA Corp. (ARIN) to Charter Communications (ARIN) on 2017-06-26 17:01 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}],"9518534eb33c5397":[{"raw_change_id":551992,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:29+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Aluminum Company of America-Warrick (ARIN) to Alcoa USA Corp. (ARIN) on 2017-05-30 20:34 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 2017-06-26)"}}