{"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":"AS21637","resource_type":"asn","page":"https://rirtracker.com/asn/21637/","statistics_now":{"registry":"ARIN","status":"assigned (dated 2021-12-06)"},"current_holder":{"rir":"ARIN","org":"Vivint Wireless, Inc.","how":"ARIN's latest statistics and the latest transfer record"},"rdap_snapshots":[],"transfers":[{"id":403,"date":"2016-10-12T18:27:26Z","type":"MERGER_ACQUISITION","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Smartrove Inc.","recipient_org":"Vivint Wireless, Inc.","range":"AS21637","log":"ARIN"}],"events":[{"event_id":"83b80ae3a15ba267","registry":"ARIN","report_date":"2021-12-06","source":"arin_issued","raw_action":"ADD","raw_line":"Add AS21637","resource_type":"asn","resource":"AS21637","start":21637,"end":21637,"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":"2026-10-13T23:53:17+00:00","page":"https://rirtracker.com/asn/21637/#e-83b80ae3a15ba267","report_page":"https://rirtracker.com/arin/reports/2021-12-06/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/21637.json","explanation":"No transfer record matches. ARIN's statistics show it reserved on 2021-12-05 and assigned (dated 2021-12-06) on 2021-12-07. The tracker saw this range removed from registration on 2020-12-05 (AS21637), so it appears to have been issued again from ARIN's pool.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2021-December/004742.html","retrieved_at":"2026-10-12T18:41:34+00:00","summary":"ARIN-Issued report for 2021-12-06: \"Add AS21637\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20211205.gz","retrieved_at":"2026-10-12T22:53:17+00:00","summary":"ARIN delegated statistics 2021-12-05 (produced 2021-12-05T14:00:12+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20211207.gz","retrieved_at":"2026-10-12T22:53:22+00:00","summary":"ARIN delegated statistics 2021-12-07 (produced 2021-12-07T14:00:12+00:00), after the report: assigned (dated 2021-12-06)"}]},{"event_id":"ab5f8596d7af4fc4","registry":"ARIN","report_date":"2021-12-06","source":"arin_issued","raw_action":"REMOVE","raw_line":"Remove AS21637","resource_type":"asn","resource":"AS21637","start":21637,"end":21637,"classification":"POOL_RECORD_CHANGE","classification_label":"Change to ARIN's own pool record","confidence":"STRONG_INFERENCE","source_rir":null,"recipient_rir":null,"source_organization":null,"recipient_organization":null,"inventory_effect":"Part of the issuance reported the same day","inventory_effect_code":"PAIRED","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:17+00:00","page":"https://rirtracker.com/asn/21637/#e-ab5f8596d7af4fc4","report_page":"https://rirtracker.com/arin/reports/2021-12-06/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/21637.json","explanation":"ARIN's statistics show it reserved on 2021-12-05 and assigned (dated 2021-12-06) on 2021-12-07. ARIN removed its own pool record for this range as part of issuing it: the same report adds AS21637. The issuance is explained on that line.","evidence":[{"type":"arin_issued","url":"https://lists.arin.net/pipermail/arin-issued/2021-December/004742.html","retrieved_at":"2026-10-12T18:41:34+00:00","summary":"ARIN-Issued report for 2021-12-06: \"Remove AS21637\""},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20211205.gz","retrieved_at":"2026-10-12T22:53:17+00:00","summary":"ARIN delegated statistics 2021-12-05 (produced 2021-12-05T14:00:12+00:00), before the report: reserved"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2021/delegated-arin-extended-20211207.gz","retrieved_at":"2026-10-12T22:53:22+00:00","summary":"ARIN delegated statistics 2021-12-07 (produced 2021-12-07T14:00:12+00:00), after the report: assigned (dated 2021-12-06)"}]},{"event_id":"c41fe643144960bc","registry":"ARIN","report_date":"2020-12-05","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"asn","resource":"AS21637","start":21637,"end":21637,"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":"2026-10-14T00:07:43+00:00","page":"https://rirtracker.com/asn/21637/#e-c41fe643144960bc","report_page":"https://rirtracker.com/arin/reports/2020-12-05/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/21637.json","observed":"AS21637 assigned on 2020-12-05, reserved on 2020-12-06","hold":{"hold_rule_source_url":"https://www.arin.net/resources/guide/request/#reissuing-returned-revoked-and-reclaimed-resources","hold_rule_months":6,"estimated_hold_end":"2021-06-05","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 assigned (dated 2001-06-01) on 2020-12-04 and reserved on 2020-12-06. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed ASNs for 6 calendar months before reissuing them, so the estimated hold end is 2021-06-05. This does not confirm availability.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20201206.gz","retrieved_at":"2026-10-12T22:34:39+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: AS21637 assigned on 2020-12-05, reserved on 2020-12-06"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20201204.gz","retrieved_at":"2026-10-12T22:34:34+00:00","summary":"ARIN delegated statistics 2020-12-04 (produced 2020-12-04T15:00:14+00:00), before the report: assigned (dated 2001-06-01)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2020/delegated-arin-extended-20201206.gz","retrieved_at":"2026-10-12T22:34:39+00:00","summary":"ARIN delegated statistics 2020-12-06 (produced 2020-12-06T15:00:14+00:00), after the report: reserved"}]},{"event_id":"5224e9d912597169","registry":"ARIN","report_date":"2016-10-12","source":"transfers","raw_action":"TRANSFER","raw_line":null,"resource_type":"asn","resource":"AS21637","start":21637,"end":21637,"classification":"MERGER_ACQUISITION","classification_label":"Merger/acquisition or reorganization","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Smartrove Inc.","recipient_organization":"Vivint Wireless, Inc.","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:27+00:00","page":"https://rirtracker.com/asn/21637/#e-5224e9d912597169","report_page":"https://rirtracker.com/arin/reports/2016-10-12/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/21637.json","observed":"Merger/acquisition: Smartrove Inc. (ARIN) to Vivint Wireless, Inc. (ARIN)","explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Smartrove Inc. (ARIN) to Vivint Wireless, Inc. (ARIN) on 2016-10-12 18:27 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 2016-10-12 18:27 UTC, Smartrove Inc. (ARIN) to Vivint Wireless, Inc. (ARIN); resources moved: AS21637"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2016/delegated-arin-extended-20161011.gz","retrieved_at":"2026-10-12T21:17:37+00:00","summary":"ARIN delegated statistics 2016-10-11 (produced 2016-10-11T05:09:56+00:00), before the report: assigned (dated 2001-06-01)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2016/delegated-arin-extended-20161013.gz","retrieved_at":"2026-10-12T21:17:42+00:00","summary":"ARIN delegated statistics 2016-10-13 (produced 2016-10-13T05:09:25+00:00), after the report: assigned (dated 2001-06-01)"}]}],"classification_history":{"83b80ae3a15ba267":[{"raw_change_id":174310,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:54:27+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2021-12-05 and assigned (dated 2021-12-06) on 2021-12-07. The tracker saw this range removed from registration on 2020-12-05 (AS21637), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":174310,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:08+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2021-12-05 and assigned (dated 2021-12-06) on 2021-12-07. The tracker saw this range removed from registration on 2020-12-05 (AS21637), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":174310,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:56+00:00","current":0,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2021-12-05 and assigned (dated 2021-12-06) on 2021-12-07. The tracker saw this range removed from registration on 2020-12-05 (AS21637), so it appears to have been issued again from ARIN's pool."},{"raw_change_id":174310,"classification_code":"APPARENT_REISSUANCE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:17+00:00","current":1,"public_explanation":"No transfer record matches. ARIN's statistics show it reserved on 2021-12-05 and assigned (dated 2021-12-06) on 2021-12-07. The tracker saw this range removed from registration on 2020-12-05 (AS21637), so it appears to have been issued again from ARIN's pool."}],"ab5f8596d7af4fc4":[{"raw_change_id":174307,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T03:54:27+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2021-12-05 and assigned (dated 2021-12-06) on 2021-12-07. ARIN removed its own pool record for this range as part of issuing it: the same report adds AS21637. The issuance is explained on that line."},{"raw_change_id":174307,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:07:08+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2021-12-05 and assigned (dated 2021-12-06) on 2021-12-07. ARIN removed its own pool record for this range as part of issuing it: the same report adds AS21637. The issuance is explained on that line."},{"raw_change_id":174307,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T14:49:56+00:00","current":0,"public_explanation":"ARIN's statistics show it reserved on 2021-12-05 and assigned (dated 2021-12-06) on 2021-12-07. ARIN removed its own pool record for this range as part of issuing it: the same report adds AS21637. The issuance is explained on that line."},{"raw_change_id":174307,"classification_code":"POOL_RECORD_CHANGE","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-13T23:53:17+00:00","current":1,"public_explanation":"ARIN's statistics show it reserved on 2021-12-05 and assigned (dated 2021-12-06) on 2021-12-07. ARIN removed its own pool record for this range as part of issuing it: the same report adds AS21637. The issuance is explained on that line."}],"c41fe643144960bc":[{"raw_change_id":405694,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T05:42:40+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 assigned (dated 2001-06-01) on 2020-12-04 and reserved on 2020-12-06. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed ASNs for 6 calendar months before reissuing them, so the earliest estimated hold expiration is 2021-06-05. This does not confirm availability."},{"raw_change_id":405694,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:19:15+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 assigned (dated 2001-06-01) on 2020-12-04 and reserved on 2020-12-06. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed ASNs for 6 calendar months before reissuing them, so the earliest estimated hold expiration is 2021-06-05. This does not confirm availability."},{"raw_change_id":405694,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:03:04+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 assigned (dated 2001-06-01) on 2020-12-04 and reserved on 2020-12-06. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed ASNs for 6 calendar months before reissuing them, so the earliest estimated hold expiration is 2021-06-05. This does not confirm availability."},{"raw_change_id":405694,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:07:43+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 assigned (dated 2001-06-01) on 2020-12-04 and reserved on 2020-12-06. Public sources do not distinguish a voluntary return, revocation, or reclamation. ARIN holds returned, revoked and reclaimed ASNs for 6 calendar months before reissuing them, so the estimated hold end is 2021-06-05. This does not confirm availability."}],"5224e9d912597169":[{"raw_change_id":550963,"classification_code":"MERGER_ACQUISITION","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-14T00:18:27+00:00","current":1,"public_explanation":"ARIN's transfer log records a merger, acquisition or reorganization from Smartrove Inc. (ARIN) to Vivint Wireless, Inc. (ARIN) on 2016-10-12 18:27 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":"assigned (dated 2021-12-06)"}}