{"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":"149.97.120.0/22","resource_type":"ipv4","page":"https://rirtracker.com/ip/149.97.120.0-149.97.123.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2016-08-23)"},"current_holder":{"rir":"ARIN","org":"Comprehensive Health Services, Inc.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":7613,"date":"2016-08-23T12:13:10Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Technology Service Corp","recipient_org":"Comprehensive Health Services, Inc.","range":"149.97.120.0/22","log":"ARIN"}],"events":[{"event_id":"19f0e7490bede3fc","registry":"ARIN","report_date":"2022-07-04","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"149.97.120.0/22","start":"149.97.120.0","end":"149.97.123.255","classification":"REMOVED_REASON_UNKNOWN","classification_label":"Removed (return, revocation or reclamation not publicly distinguishable)","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Possible future reissue candidate after hold","inventory_effect_code":"HOLD_CANDIDATE","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:09:29+00:00","page":"https://rirtracker.com/ip/149.97.120.0-149.97.123.255/#e-19f0e7490bede3fc","report_page":"https://rirtracker.com/arin/reports/2022-07-04/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/149.97.120.0-149.97.123.255.json","observed":"149.97.120.0/22 allocated on 2022-07-04, reserved on 2022-07-05","hold":{"hold_rule_source_url":"https://www.arin.net/resources/guide/request/#reissuing-returned-revoked-and-reclaimed-resources","hold_rule_days":60,"estimated_hold_end":"2022-09-02","availability_statement":"Possible reissue candidate after this date; not confirmed available"},"explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it allocated (dated 2016-08-23) on 2022-07-03 and reserved on 2022-07-05. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the estimated hold end is 2022-09-02. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220705.gz","retrieved_at":"2026-10-12T23:04:05+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 149.97.120.0/22 allocated on 2022-07-04, reserved on 2022-07-05"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220703.gz","retrieved_at":"2026-10-12T23:04:00+00:00","summary":"ARIN delegated statistics 2022-07-03 (produced 2022-07-03T13:00:09+00:00), before the report: allocated (dated 2016-08-23)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2022/delegated-arin-extended-20220705.gz","retrieved_at":"2026-10-12T23:04:05+00:00","summary":"ARIN delegated statistics 2022-07-05 (produced 2022-07-05T13:00:08+00:00), after the report: reserved"}]},{"event_id":"4a2a7c0f9f4de515","registry":"ARIN","report_date":"2016-08-23","source":"arin_issued","raw_action":"ADD","raw_line":"Add 149.97.120.0-149.97.123.255","resource_type":"ipv4","resource":"149.97.120.0/22","start":"149.97.120.0","end":"149.97.123.255","classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Technology Service Corp","recipient_organization":"Comprehensive Health Services, Inc.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:37+00:00","page":"https://rirtracker.com/ip/149.97.120.0-149.97.123.255/#e-4a2a7c0f9f4de515","report_page":"https://rirtracker.com/arin/reports/2016-08-23/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/149.97.120.0-149.97.123.255.json","explanation":"ARIN's transfer log records a transfer from Technology Service Corp (ARIN) to Comprehensive Health Services, Inc. (ARIN) on 2016-08-23 12:13 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/2016-August/002812.html","retrieved_at":"2026-10-12T18:39:19+00:00","summary":"ARIN-Issued report for 2016-08-23: \"Add 149.97.120.0-149.97.123.255\""},{"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 2016-08-23 12:13 UTC, Technology Service Corp (ARIN) to Comprehensive Health Services, Inc. (ARIN); resources moved: 149.97.120.0/22"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2016/delegated-arin-extended-20160822.gz","retrieved_at":"2026-10-12T21:15:11+00:00","summary":"ARIN delegated statistics 2016-08-22 (produced 2016-08-22T05:08:36+00:00), before the report: assigned (dated 1993-11-16)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2016/delegated-arin-extended-20160824.gz","retrieved_at":"2026-10-12T21:15:16+00:00","summary":"ARIN delegated statistics 2016-08-24 (produced 2016-08-24T05:09:17+00:00), after the report: assigned (dated 2016-08-23)"}]}],"classification_history":{"19f0e7490bede3fc":[{"raw_change_id":430429,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T05:52:21+00:00","current":0,"public_explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it allocated (dated 2016-08-23) on 2022-07-03 and reserved on 2022-07-05. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the earliest estimated hold expiration is 2022-09-02. This does not confirm availability."},{"raw_change_id":430429,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:20:44+00:00","current":0,"public_explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it allocated (dated 2016-08-23) on 2022-07-03 and reserved on 2022-07-05. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the earliest estimated hold expiration is 2022-09-02. This does not confirm availability."},{"raw_change_id":430429,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:04:39+00:00","current":0,"public_explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it allocated (dated 2016-08-23) on 2022-07-03 and reserved on 2022-07-05. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the earliest estimated hold expiration is 2022-09-02. This does not confirm availability."},{"raw_change_id":430429,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:09:29+00:00","current":1,"public_explanation":"Removed from active registration. ARIN-Issued didn't list this; the tracker found it by comparing ARIN's daily statistics. ARIN's statistics show it allocated (dated 2016-08-23) on 2022-07-03 and reserved on 2022-07-05. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed IPv4 space for 60 days before reissuing it, so the estimated hold end is 2022-09-02. This does not confirm availability."}],"4a2a7c0f9f4de515":[{"raw_change_id":145957,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:35:52+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Technology Service Corp (ARIN) to Comprehensive Health Services, Inc. (ARIN) on 2016-08-23 12:13 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":145957,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:53+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Technology Service Corp (ARIN) to Comprehensive Health Services, Inc. (ARIN) on 2016-08-23 12:13 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":145957,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:31+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Technology Service Corp (ARIN) to Comprehensive Health Services, Inc. (ARIN) on 2016-08-23 12:13 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":145957,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:51:37+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Technology Service Corp (ARIN) to Comprehensive Health Services, Inc. (ARIN) on 2016-08-23 12:13 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}]},"arin_statistics_now":{"status":"allocated (dated 2016-08-23)"}}