{"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":"37.221.72.0/22","resource_type":"ipv4","page":"https://rirtracker.com/ip/37.221.72.0-37.221.75.255/","statistics_now":{"registry":"RIPE NCC","status":"allocated (dated 2018-11-12)"},"current_holder":{"rir":"RIPE NCC","org":"Unzer Group GmbH","how":"The RIPE NCC's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":107670,"date":"2024-09-02T19:00:00Z","type":"MERGER_ACQUISITION","source_rir":"RIPE NCC","recipient_rir":"RIPE NCC","source_org":"Unzer GmbH","recipient_org":"Unzer Group GmbH","range":"37.221.72.0/22","log":"RIPE NCC"},{"id":78597,"date":"2021-06-01T19:00:00Z","type":"MERGER_ACQUISITION","source_rir":"RIPE NCC","recipient_rir":"RIPE NCC","source_org":"heidelpay Systems GmbH","recipient_org":"heidelpay Group GmbH","range":"37.221.72.0/22","log":"RIPE NCC"}],"events":[{"event_id":"34160951ed289103","registry":"RIPE NCC","report_date":"2024-09-02","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"37.221.72.0/22","start":"37.221.72.0","end":"37.221.75.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"RIPE NCC","recipient_rir":"RIPE NCC","source_organization":"Unzer GmbH","recipient_organization":"Unzer Group GmbH","inventory_effect":"No effect on RIPE NCC applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:50:09+00:00","page":"https://rirtracker.com/ip/37.221.72.0-37.221.75.255/#e-34160951ed289103","report_page":"https://rirtracker.com/ripe/reports/2024-09-02/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/37.221.72.0-37.221.75.255.json","observed":"Merger/acquisition: Unzer GmbH (RIPE NCC) to Unzer Group GmbH (RIPE NCC)","explanation":"The RIPE NCC's transfer log records a merger, acquisition or reorganization from Unzer GmbH (RIPE NCC) to Unzer Group GmbH (RIPE NCC) on 2024-09-02 19:00 UTC. The registration changed hands; it is not a new allocation from the RIPE NCC.","evidence":[{"type":"transfer","url":"https://ftp.ripe.net/pub/stats/ripencc/transfers/transfers_latest.json","retrieved_at":"2026-10-13T21:49:37+00:00","summary":"Transfer log: MERGER_ACQUISITION on 2024-09-02 19:00 UTC, Unzer GmbH (RIPE NCC) to Unzer Group GmbH (RIPE NCC); resources moved: 37.221.72.0/22"},{"type":"delegated_before","url":"https://ftp.ripe.net/pub/stats/ripencc/2024/delegated-ripencc-extended-20240901.bz2","retrieved_at":"2026-10-13T00:39:11+00:00","summary":"RIPE NCC delegated statistics 2024-09-01 (produced 2024-09-01T21:59:59+00:00), before the change: allocated (dated 2018-11-12)"},{"type":"delegated_after","url":"https://ftp.ripe.net/pub/stats/ripencc/2024/delegated-ripencc-extended-20240902.bz2","retrieved_at":"2026-10-13T00:39:14+00:00","summary":"RIPE NCC delegated statistics 2024-09-02 (produced 2024-09-02T21:59:59+00:00), after the change: allocated (dated 2018-11-12)"}]},{"event_id":"5df3ddc329b2d62d","registry":"RIPE NCC","report_date":"2021-06-01","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"37.221.72.0/22","start":"37.221.72.0","end":"37.221.75.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"RIPE NCC","recipient_rir":"RIPE NCC","source_organization":"heidelpay Systems GmbH","recipient_organization":"heidelpay Group GmbH","inventory_effect":"No effect on RIPE NCC applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:48:38+00:00","page":"https://rirtracker.com/ip/37.221.72.0-37.221.75.255/#e-5df3ddc329b2d62d","report_page":"https://rirtracker.com/ripe/reports/2021-06-01/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/37.221.72.0-37.221.75.255.json","observed":"Merger/acquisition: heidelpay Systems GmbH (RIPE NCC) to heidelpay Group GmbH (RIPE NCC)","explanation":"The RIPE NCC's transfer log records a merger, acquisition or reorganization from heidelpay Systems GmbH (RIPE NCC) to heidelpay Group GmbH (RIPE NCC) on 2021-06-01 19:00 UTC. The registration changed hands; it is not a new allocation from the RIPE NCC.","evidence":[{"type":"transfer","url":"https://ftp.ripe.net/pub/stats/ripencc/transfers/transfers_latest.json","retrieved_at":"2026-10-13T21:49:37+00:00","summary":"Transfer log: MERGER_ACQUISITION on 2021-06-01 19:00 UTC, heidelpay Systems GmbH (RIPE NCC) to heidelpay Group GmbH (RIPE NCC); resources moved: 37.221.72.0/22"},{"type":"delegated_before","url":"https://ftp.ripe.net/pub/stats/ripencc/2021/delegated-ripencc-extended-20210531.bz2","retrieved_at":"2026-10-12T23:08:55+00:00","summary":"RIPE NCC delegated statistics 2021-05-31 (produced 2021-05-31T21:59:00+00:00), before the change: allocated (dated 2018-11-12)"},{"type":"delegated_after","url":"https://ftp.ripe.net/pub/stats/ripencc/2021/delegated-ripencc-extended-20210601.bz2","retrieved_at":"2026-10-12T23:08:58+00:00","summary":"RIPE NCC delegated statistics 2021-06-01 (produced 2021-06-01T21:59:00+00:00), after the change: allocated (dated 2018-11-12)"}]},{"event_id":"ae29e9190b373aa8","registry":"RIPE NCC","report_date":"2018-11-12","source":"statistics","raw_action":"ADDED","raw_line":null,"resource_type":"ipv4","resource":"37.221.72.0/22","start":"37.221.72.0","end":"37.221.75.255","classification":"APPARENT_REISSUANCE","classification_label":"Apparent reissuance of previously removed resource","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Likely issued from RIPE NCC-controlled inventory","inventory_effect_code":"ISSUED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:05:04+00:00","page":"https://rirtracker.com/ip/37.221.72.0-37.221.75.255/#e-ae29e9190b373aa8","report_page":"https://rirtracker.com/ripe/reports/2018-11-12/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/37.221.72.0-37.221.75.255.json","observed":"37.221.72.0/22 available on 2018-11-11, allocated on 2018-11-12","explanation":"No transfer record matches. The RIPE NCC's statistics show it available on 2018-11-11 and allocated (dated 2018-11-12) on 2018-11-12. The tracker saw this range released from hold on 2014-06-20 (37.221.64.0/18), so it appears to have been issued again from the RIPE NCC's pool.","evidence":[{"type":"statistics_diff","url":"https://ftp.ripe.net/pub/stats/ripencc/2018/delegated-ripencc-extended-20181112.bz2","retrieved_at":"2026-10-12T21:57:22+00:00","summary":"Found by comparing the RIPE NCC's daily statistics: 37.221.72.0/22 available on 2018-11-11, allocated on 2018-11-12"},{"type":"delegated_before","url":"https://ftp.ripe.net/pub/stats/ripencc/2018/delegated-ripencc-extended-20181111.bz2","retrieved_at":"2026-10-12T21:57:19+00:00","summary":"RIPE NCC delegated statistics 2018-11-11 (produced 2018-11-11T22:59:59+00:00), before the change: available"},{"type":"delegated_after","url":"https://ftp.ripe.net/pub/stats/ripencc/2018/delegated-ripencc-extended-20181112.bz2","retrieved_at":"2026-10-12T21:57:22+00:00","summary":"RIPE NCC delegated statistics 2018-11-12 (produced 2018-11-12T22:59:59+00:00), after the change: allocated (dated 2018-11-12)"}]}],"classification_history":{"34160951ed289103":[{"raw_change_id":108293,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:06:18+00:00","current":0,"public_explanation":"The RIPE NCC's transfer log records a merger, acquisition or reorganization from Unzer GmbH (RIPE NCC) to Unzer Group GmbH (RIPE NCC) on 2024-09-02 19:00 UTC. The registration changed hands; it is not a new allocation from the RIPE NCC."},{"raw_change_id":108293,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:04:46+00:00","current":0,"public_explanation":"The RIPE NCC's transfer log records a merger, acquisition or reorganization from Unzer GmbH (RIPE NCC) to Unzer Group GmbH (RIPE NCC) on 2024-09-02 19:00 UTC. The registration changed hands; it is not a new allocation from the RIPE NCC."},{"raw_change_id":108293,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:47:15+00:00","current":0,"public_explanation":"The RIPE NCC's transfer log records a merger, acquisition or reorganization from Unzer GmbH (RIPE NCC) to Unzer Group GmbH (RIPE NCC) on 2024-09-02 19:00 UTC. The registration changed hands; it is not a new allocation from the RIPE NCC."},{"raw_change_id":108293,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:50:09+00:00","current":1,"public_explanation":"The RIPE NCC's transfer log records a merger, acquisition or reorganization from Unzer GmbH (RIPE NCC) to Unzer Group GmbH (RIPE NCC) on 2024-09-02 19:00 UTC. The registration changed hands; it is not a new allocation from the RIPE NCC."}],"5df3ddc329b2d62d":[{"raw_change_id":78733,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T02:53:53+00:00","current":0,"public_explanation":"The RIPE NCC's transfer log records a merger, acquisition or reorganization from heidelpay Systems GmbH (RIPE NCC) to heidelpay Group GmbH (RIPE NCC) on 2021-06-01 19:00 UTC. The registration changed hands; it is not a new allocation from the RIPE NCC."},{"raw_change_id":78733,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:03:33+00:00","current":0,"public_explanation":"The RIPE NCC's transfer log records a merger, acquisition or reorganization from heidelpay Systems GmbH (RIPE NCC) to heidelpay Group GmbH (RIPE NCC) on 2021-06-01 19:00 UTC. The registration changed hands; it is not a new allocation from the RIPE NCC."},{"raw_change_id":78733,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:45:54+00:00","current":0,"public_explanation":"The RIPE NCC's transfer log records a merger, acquisition or reorganization from heidelpay Systems GmbH (RIPE NCC) to heidelpay Group GmbH (RIPE NCC) on 2021-06-01 19:00 UTC. The registration changed hands; it is not a new allocation from the RIPE NCC."},{"raw_change_id":78733,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:48:38+00:00","current":1,"public_explanation":"The RIPE NCC's transfer log records a merger, acquisition or reorganization from heidelpay Systems GmbH (RIPE NCC) to heidelpay Group GmbH (RIPE NCC) on 2021-06-01 19:00 UTC. The registration changed hands; it is not a new allocation from the RIPE NCC."}],"ae29e9190b373aa8":[{"raw_change_id":365610,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T05:26:36+00:00","current":0,"public_explanation":"No transfer record matches. The RIPE NCC's statistics show it available on 2018-11-11 and allocated (dated 2018-11-12) on 2018-11-12. The tracker saw this range released from hold on 2014-06-20 (37.221.64.0/18), so it appears to have been issued again from the RIPE NCC's pool."},{"raw_change_id":365610,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:17:04+00:00","current":0,"public_explanation":"No transfer record matches. The RIPE NCC's statistics show it available on 2018-11-11 and allocated (dated 2018-11-12) on 2018-11-12. The tracker saw this range released from hold on 2014-06-20 (37.221.64.0/18), so it appears to have been issued again from the RIPE NCC's pool."},{"raw_change_id":365610,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:00:43+00:00","current":0,"public_explanation":"No transfer record matches. The RIPE NCC's statistics show it available on 2018-11-11 and allocated (dated 2018-11-12) on 2018-11-12. The tracker saw this range released from hold on 2014-06-20 (37.221.64.0/18), so it appears to have been issued again from the RIPE NCC's pool."},{"raw_change_id":365610,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:05:04+00:00","current":1,"public_explanation":"No transfer record matches. The RIPE NCC's statistics show it available on 2018-11-11 and allocated (dated 2018-11-12) on 2018-11-12. The tracker saw this range released from hold on 2014-06-20 (37.221.64.0/18), so it appears to have been issued again from the RIPE NCC's pool."}]},"arin_statistics_now":{"status":"not listed"}}