{"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":"173.0.112.0/20","resource_type":"ipv4","page":"https://rirtracker.com/ip/173.0.112.0-173.0.127.255/","statistics_now":{"registry":"ARIN","status":"allocated (dated 2010-06-23)"},"current_holder":{"rir":"ARIN","org":"GTT Americas, LLC","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":40311,"date":"2025-05-07T14:08:47Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"GTT","recipient_org":"GTT Americas, LLC","range":"173.0.112.0/20","log":"ARIN"},{"id":36886,"date":"2024-10-08T17:09:44Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"GTT 360, Inc.","recipient_org":"GTT","range":"173.0.112.0/20","log":"ARIN"}],"events":[{"event_id":"1578db5b7cfc4345","registry":"ARIN","report_date":"2025-05-07","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"173.0.112.0/20","start":"173.0.112.0","end":"173.0.127.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"GTT","recipient_organization":"GTT Americas, LLC","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:21+00:00","page":"https://rirtracker.com/ip/173.0.112.0-173.0.127.255/#e-1578db5b7cfc4345","report_page":"https://rirtracker.com/arin/reports/2025-05-07/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/173.0.112.0-173.0.127.255.json","observed":"Merger/acquisition: GTT (ARIN) to GTT Americas, LLC (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from GTT (ARIN) to GTT Americas, LLC (ARIN) on 2025-05-07 14:08 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 2025-05-07 14:08 UTC, GTT (ARIN) to GTT Americas, LLC (ARIN); resources moved: 173.0.112.0/20"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250506.gz","retrieved_at":"2026-10-12T23:59:23+00:00","summary":"ARIN delegated statistics 2025-05-06 (produced 2025-05-06T13:01:10+00:00), before the report: allocated (dated 2010-06-23)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250508.gz","retrieved_at":"2026-10-12T23:59:28+00:00","summary":"ARIN delegated statistics 2025-05-08 (produced 2025-05-08T13:01:09+00:00), after the report: allocated (dated 2010-06-23)"}]},{"event_id":"ddfd86a77288cbcd","registry":"ARIN","report_date":"2024-10-08","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"ipv4","resource":"173.0.112.0/20","start":"173.0.112.0","end":"173.0.127.255","classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"GTT 360, Inc.","recipient_organization":"GTT","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:17+00:00","page":"https://rirtracker.com/ip/173.0.112.0-173.0.127.255/#e-ddfd86a77288cbcd","report_page":"https://rirtracker.com/arin/reports/2024-10-08/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/173.0.112.0-173.0.127.255.json","observed":"Merger/acquisition: GTT 360, Inc. (ARIN) to GTT (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from GTT 360, Inc. (ARIN) to GTT (ARIN) on 2024-10-08 17:09 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 2024-10-08 17:09 UTC, GTT 360, Inc. (ARIN) to GTT (ARIN); resources moved: 173.0.112.0/20"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20241007.gz","retrieved_at":"2026-10-12T23:47:54+00:00","summary":"ARIN delegated statistics 2024-10-07 (produced 2024-10-07T13:00:53+00:00), before the report: allocated (dated 2010-06-23)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2024/delegated-arin-extended-20241009.gz","retrieved_at":"2026-10-12T23:47:59+00:00","summary":"ARIN delegated statistics 2024-10-09 (produced 2024-10-09T13:00:53+00:00), after the report: allocated (dated 2010-06-23)"}]},{"event_id":"d5c00c9f61287d81","registry":"ARIN","report_date":"2015-11-10","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"ipv4","resource":"173.0.112.0/20","start":"173.0.112.0","end":"173.0.127.255","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":"2026-10-14T00:01:29+00:00","page":"https://rirtracker.com/ip/173.0.112.0-173.0.127.255/#e-d5c00c9f61287d81","report_page":"https://rirtracker.com/arin/reports/2015-11-10/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/173.0.112.0-173.0.127.255.json","observed":"173.0.112.0/20 allocated on 2015-11-10, reserved on 2015-11-11","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":"2016-01-09","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 2010-06-23) on 2015-11-09 and reserved on 2015-11-11. 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 2016-01-09. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2015/delegated-arin-extended-20151111.gz","retrieved_at":"2026-10-12T21:01:26+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: 173.0.112.0/20 allocated on 2015-11-10, reserved on 2015-11-11"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2015/delegated-arin-extended-20151109.gz","retrieved_at":"2026-10-12T21:01:21+00:00","summary":"ARIN delegated statistics 2015-11-09 (produced 2015-11-09T06:05:17+00:00), before the report: allocated (dated 2010-06-23)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2015/delegated-arin-extended-20151111.gz","retrieved_at":"2026-10-12T21:01:26+00:00","summary":"ARIN delegated statistics 2015-11-11 (produced 2015-11-11T06:04:46+00:00), after the report: reserved"}]},{"event_id":"7557d7956b1bdca2","registry":"ARIN","report_date":"2010-06-23","source":"arin_issued","raw_action":"ADD","raw_line":"Add 173.0.112.0-173.0.127.255","resource_type":"ipv4","resource":"173.0.112.0/20","start":"173.0.112.0","end":"173.0.127.255","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 ARIN-controlled inventory","inventory_effect_code":"ISSUED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:50:49+00:00","page":"https://rirtracker.com/ip/173.0.112.0-173.0.127.255/#e-7557d7956b1bdca2","report_page":"https://rirtracker.com/arin/reports/2010-06-23/","evidence_url":"https://rirtracker.com/api/v1/resources/ip/173.0.112.0-173.0.127.255.json","explanation":"No transfer record matches. ARIN's statistics show it not issued on 2010-06-22 and allocated (dated 2010-06-23) on 2010-06-24. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2010-04-12 (173.0.0.0-173.0.255.255), so it appears to have been issued again from ARIN's pool.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2010-June/000554.html","retrieved_at":"2026-10-12T18:36:43+00:00","summary":"ARIN-Issued report for 2010-06-23: \"Add 173.0.112.0-173.0.127.255\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20100622.gz","retrieved_at":"2026-10-12T19:06:48+00:00","summary":"ARIN delegated statistics 2010-06-22, before the report: not issued"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2010/delegated-arin-20100624.gz","retrieved_at":"2026-10-12T19:06:53+00:00","summary":"ARIN delegated statistics 2010-06-24, after the report: allocated (dated 2010-06-23)"}]}],"classification_history":{"1578db5b7cfc4345":[{"raw_change_id":573575,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:21+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from GTT (ARIN) to GTT Americas, LLC (ARIN) on 2025-05-07 14:08 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."}],"ddfd86a77288cbcd":[{"raw_change_id":571806,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:19:17+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from GTT 360, Inc. (ARIN) to GTT (ARIN) on 2024-10-08 17:09 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."}],"d5c00c9f61287d81":[{"raw_change_id":310064,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T05:00:19+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 2010-06-23) on 2015-11-09 and reserved on 2015-11-11. 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 2016-01-09. This does not confirm availability."},{"raw_change_id":310064,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:14:04+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 2010-06-23) on 2015-11-09 and reserved on 2015-11-11. 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 2016-01-09. This does not confirm availability."},{"raw_change_id":310064,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:57:29+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 2010-06-23) on 2015-11-09 and reserved on 2015-11-11. 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 2016-01-09. This does not confirm availability."},{"raw_change_id":310064,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:01:29+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 2010-06-23) on 2015-11-09 and reserved on 2015-11-11. 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 2016-01-09. This does not confirm availability."}],"7557d7956b1bdca2":[{"raw_change_id":121478,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:12:18+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2010-06-22 and allocated (dated 2010-06-23) on 2010-06-24. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2010-04-12 (173.0.0.0-173.0.255.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":121478,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:05:17+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2010-06-22 and allocated (dated 2010-06-23) on 2010-06-24. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2010-04-12 (173.0.0.0-173.0.255.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":121478,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:47:50+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2010-06-22 and allocated (dated 2010-06-23) on 2010-06-24. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2010-04-12 (173.0.0.0-173.0.255.255), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":121478,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:50:49+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it not issued on 2010-06-22 and allocated (dated 2010-06-23) on 2010-06-24. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2010-04-12 (173.0.0.0-173.0.255.255), so it appears to have been issued again from ARIN's pool."}]},"arin_statistics_now":{"status":"allocated (dated 2010-06-23)"}}