{"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":"37.251.240.0/21","resource_type":"ipv4","page":"https://rirtracker.com/ip/37.251.240.0-37.251.247.255/","statistics_now":{"registry":"RIPE NCC","status":"allocated (dated 2012-04-18)"},"current_holder":{"rir":"RIPE NCC","org":"Eurofiber Nederland BV","how":"The RIPE NCC's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":101716,"date":"2024-01-23T19:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"RIPE NCC","recipient_rir":"RIPE NCC","source_org":"Heap Layer, LLC","recipient_org":"Eurofiber Nederland BV","range":"37.251.240.0/21","log":"RIPE NCC"},{"id":55712,"date":"2017-12-06T19:00:00Z","type":"RESOURCE_TRANSFER","source_rir":"RIPE NCC","recipient_rir":"RIPE NCC","source_org":"CLAX TELECOM SRL","recipient_org":"Heap Layer, LLC","range":"37.251.240.0/21","log":"RIPE NCC"}],"events":[{"event_id":"97f0e9972be32f5f","registry":"RIPE NCC","report_date":"2024-01-23","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"37.251.240.0/21","start":"37.251.240.0","end":"37.251.247.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-RIPE NCC transfer","confidence":"CONFIRMED","source_rir":"RIPE NCC","recipient_rir":"RIPE NCC","source_organization":"Heap Layer, LLC","recipient_organization":"Eurofiber Nederland BV","inventory_effect":"No effect on RIPE NCC applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:49:51+00:00","page":"https://rirtracker.com/ip/37.251.240.0-37.251.247.255/#e-97f0e9972be32f5f","report_page":"https://rirtracker.com/ripe/reports/2024-01-23/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/37.251.240.0-37.251.247.255.json","observed":"Transfer: Heap Layer, LLC (RIPE NCC) to Eurofiber Nederland BV (RIPE NCC)","explanation":"The RIPE NCC's transfer log records a transfer from Heap Layer, LLC (RIPE NCC) to Eurofiber Nederland BV (RIPE NCC) on 2024-01-23 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: RESOURCE_TRANSFER on 2024-01-23 19:00 UTC, Heap Layer, LLC (RIPE NCC) to Eurofiber Nederland BV (RIPE NCC); resources moved: 37.251.240.0/21"},{"type":"delegated_before","url":"https://ftp.ripe.net/pub/stats/ripencc/2024/delegated-ripencc-extended-20240122.bz2","retrieved_at":"2026-10-13T00:21:48+00:00","summary":"RIPE NCC delegated statistics 2024-01-22 (produced 2024-01-22T22:59:59+00:00), before the change: allocated (dated 2012-04-18)"},{"type":"delegated_after","url":"https://ftp.ripe.net/pub/stats/ripencc/2024/delegated-ripencc-extended-20240123.bz2","retrieved_at":"2026-10-13T00:21:51+00:00","summary":"RIPE NCC delegated statistics 2024-01-23 (produced 2024-01-23T22:59:59+00:00), after the change: allocated (dated 2012-04-18)"}]},{"event_id":"383e489b9288aee1","registry":"RIPE NCC","report_date":"2017-12-06","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"37.251.240.0/21","start":"37.251.240.0","end":"37.251.247.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-RIPE NCC transfer","confidence":"CONFIRMED","source_rir":"RIPE NCC","recipient_rir":"RIPE NCC","source_organization":"CLAX TELECOM SRL","recipient_organization":"Heap Layer, LLC","inventory_effect":"No effect on RIPE NCC applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:47:25+00:00","page":"https://rirtracker.com/ip/37.251.240.0-37.251.247.255/#e-383e489b9288aee1","report_page":"https://rirtracker.com/ripe/reports/2017-12-06/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/37.251.240.0-37.251.247.255.json","observed":"Transfer: CLAX TELECOM SRL (RIPE NCC) to Heap Layer, LLC (RIPE NCC)","piece_of":{"resource":"37.251.128.0/17","page":"https://rirtracker.com/ip/37.251.128.0-37.251.255.255/"},"explanation":"The RIPE NCC's transfer log records a transfer from CLAX TELECOM SRL (RIPE NCC) to Heap Layer, LLC (RIPE NCC) on 2017-12-06 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: RESOURCE_TRANSFER on 2017-12-06 19:00 UTC, CLAX TELECOM SRL (RIPE NCC) to Heap Layer, LLC (RIPE NCC); resources moved: 37.251.240.0/21"},{"type":"delegated_before","url":"https://ftp.ripe.net/pub/stats/ripencc/2017/delegated-ripencc-extended-20171205.bz2","retrieved_at":"2026-10-12T21:33:50+00:00","summary":"RIPE NCC delegated statistics 2017-12-05 (produced 2017-12-05T22:59:59+00:00), before the change: allocated (dated 2012-04-18)"},{"type":"delegated_after","url":"https://ftp.ripe.net/pub/stats/ripencc/2017/delegated-ripencc-extended-20171206.bz2","retrieved_at":"2026-10-12T21:33:53+00:00","summary":"RIPE NCC delegated statistics 2017-12-06 (produced 2017-12-06T22:59:59+00:00), after the change: allocated (dated 2012-04-18)"}]}],"classification_history":{"97f0e9972be32f5f":[{"raw_change_id":102268,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:03:41+00:00","current":0,"public_explanation":"The RIPE NCC's transfer log records a transfer from Heap Layer, LLC (RIPE NCC) to Eurofiber Nederland BV (RIPE NCC) on 2024-01-23 19:00 UTC. The registration changed hands; it is not a new allocation from the RIPE NCC."},{"raw_change_id":102268,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:04:32+00:00","current":0,"public_explanation":"The RIPE NCC's transfer log records a transfer from Heap Layer, LLC (RIPE NCC) to Eurofiber Nederland BV (RIPE NCC) on 2024-01-23 19:00 UTC. The registration changed hands; it is not a new allocation from the RIPE NCC."},{"raw_change_id":102268,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:47:00+00:00","current":0,"public_explanation":"The RIPE NCC's transfer log records a transfer from Heap Layer, LLC (RIPE NCC) to Eurofiber Nederland BV (RIPE NCC) on 2024-01-23 19:00 UTC. 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The registration changed hands; it is not a new allocation from the RIPE NCC."},{"raw_change_id":54924,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:47:25+00:00","current":1,"public_explanation":"The RIPE NCC's transfer log records a transfer from CLAX TELECOM SRL (RIPE NCC) to Heap Layer, LLC (RIPE NCC) on 2017-12-06 19:00 UTC. The registration changed hands; it is not a new allocation from the RIPE NCC."}]},"arin_statistics_now":{"status":"not listed"}}