{"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":"AS11153","resource_type":"asn","page":"https://rirtracker.com/asn/11153/","statistics_now":{"registry":"ARIN","status":"reserved"},"current_holder":{"rir":"ARIN","org":null,"how":"ARIN's latest statistics"},"rdap_snapshots":[],"transfers":[{"id":839,"date":"2018-01-04T19:10:36Z","type":"RESOURCE_TRANSFER","source_rir":"ARIN","recipient_rir":"ARIN","source_org":"Unison Networks LLC","recipient_org":"Corporate Support & Fulfillment LLC","range":"AS11153","log":"ARIN"}],"events":[{"event_id":"0d990a5172e9fccd","registry":"ARIN","report_date":"2025-06-09","source":"statistics","raw_action":"NOT_IN_ARIN_ISSUED","raw_line":null,"resource_type":"asn","resource":"AS11153","start":11153,"end":11153,"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":"2026-10-14T00:13:20+00:00","page":"https://rirtracker.com/asn/11153/#e-0d990a5172e9fccd","report_page":"https://rirtracker.com/arin/reports/2025-06-09/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/11153.json","observed":"AS11153 assigned on 2025-06-09, reserved on 2025-06-10","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":"2025-12-09","availability_statement":"Possible reissue candidate after this date; not confirmed available","released_sooner_since":"2024-07-01"},"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 2018-01-04) on 2025-06-08 and reserved on 2025-06-10. 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 2025-12-09. This does not confirm availability. Since mid-2024, ARIN has released many ASNs within two months, before the 6 calendar months were up, so the release can come sooner.","evidence":[{"type":"statistics_diff","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250610.gz","retrieved_at":"2026-10-13T00:01:21+00:00","summary":"Not listed in ARIN-Issued; found by comparing ARIN's daily statistics: AS11153 assigned on 2025-06-09, reserved on 2025-06-10"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250608.gz","retrieved_at":"2026-10-13T00:01:16+00:00","summary":"ARIN delegated statistics 2025-06-08 (produced 2025-06-08T13:01:12+00:00), before the report: assigned (dated 2018-01-04)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2025/delegated-arin-extended-20250610.gz","retrieved_at":"2026-10-13T00:01:21+00:00","summary":"ARIN delegated statistics 2025-06-10 (produced 2025-06-10T13:01:14+00:00), after the report: reserved"}]},{"event_id":"487671fdf160487c","registry":"ARIN","report_date":"2018-01-04","source":"arin_issued","raw_action":"ADD","raw_line":"Add AS11153","resource_type":"asn","resource":"AS11153","start":11153,"end":11153,"classification":"INTRA_RIR_TRANSFER","classification_label":"Intra-ARIN transfer","confidence":"CONFIRMED","source_rir":"ARIN","recipient_rir":"ARIN","source_organization":"Unison Networks LLC","recipient_organization":"Corporate Support & Fulfillment LLC","inventory_effect":"No effect on ARIN applicant inventory","inventory_effect_code":"NO_EFFECT","provisional":false,"classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:02+00:00","page":"https://rirtracker.com/asn/11153/#e-487671fdf160487c","report_page":"https://rirtracker.com/arin/reports/2018-01-04/","evidence_url":"https://rirtracker.com/api/v1/resources/asn/11153.json","explanation":"ARIN's transfer log records a transfer from Unison Networks LLC (ARIN) to Corporate Support & Fulfillment LLC (ARIN) on 2018-01-04 19:10 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/2018-January/003312.html","retrieved_at":"2026-10-12T18:39:55+00:00","summary":"ARIN-Issued report for 2018-01-04: \"Add AS11153\""},{"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 2018-01-04 19:10 UTC, Unison Networks LLC (ARIN) to Corporate Support & Fulfillment LLC (ARIN); resources moved: AS11153"},{"type":"delegated_before","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180103.gz","retrieved_at":"2026-10-12T21:39:41+00:00","summary":"ARIN delegated statistics 2018-01-03 (produced 2018-01-03T06:08:31+00:00), before the report: assigned (dated 2010-12-06)"},{"type":"delegated_after","url":"https://ftp.arin.net/pub/stats/arin/archive/2018/delegated-arin-extended-20180105.gz","retrieved_at":"2026-10-12T21:39:54+00:00","summary":"ARIN delegated statistics 2018-01-05 (produced 2018-01-05T06:09:28+00:00), after the report: assigned (dated 2018-01-04)"}]}],"classification_history":{"0d990a5172e9fccd":[{"raw_change_id":481446,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.0","classified_at":"2026-10-13T06:15:37+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 2018-01-04) on 2025-06-08 and reserved on 2025-06-10. 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 2025-12-09. This does not confirm availability."},{"raw_change_id":481446,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.1","classified_at":"2026-10-13T08:23:48+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 2018-01-04) on 2025-06-08 and reserved on 2025-06-10. 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 2025-12-09. This does not confirm availability."},{"raw_change_id":481446,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.3.2","classified_at":"2026-10-13T15:07:56+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 2018-01-04) on 2025-06-08 and reserved on 2025-06-10. 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 2025-12-09. This does not confirm availability."},{"raw_change_id":481446,"classification_code":"REMOVED_REASON_UNKNOWN","confidence":"STRONG_INFERENCE","classifier_version":"1.4.0","classified_at":"2026-10-14T00:13:20+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 2018-01-04) on 2025-06-08 and reserved on 2025-06-10. 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 2025-12-09. This does not confirm availability. Since mid-2024, ARIN has released many ASNs within two months, before the 6 calendar months were up, so the release can come sooner."}],"487671fdf160487c":[{"raw_change_id":152672,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.0","classified_at":"2026-10-13T03:40:00+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Unison Networks LLC (ARIN) to Corporate Support & Fulfillment LLC (ARIN) on 2018-01-04 19:10 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":152672,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.1","classified_at":"2026-10-13T08:06:12+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Unison Networks LLC (ARIN) to Corporate Support & Fulfillment LLC (ARIN) on 2018-01-04 19:10 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":152672,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.3.2","classified_at":"2026-10-13T14:48:52+00:00","current":0,"public_explanation":"ARIN's transfer log records a transfer from Unison Networks LLC (ARIN) to Corporate Support & Fulfillment LLC (ARIN) on 2018-01-04 19:10 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."},{"raw_change_id":152672,"classification_code":"INTRA_RIR_TRANSFER","confidence":"CONFIRMED","classifier_version":"1.4.0","classified_at":"2026-10-13T23:52:02+00:00","current":1,"public_explanation":"ARIN's transfer log records a transfer from Unison Networks LLC (ARIN) to Corporate Support & Fulfillment LLC (ARIN) on 2018-01-04 19:10 UTC. ARIN-Issued lists it as \"Add\" because the registration changed hands; it is not a new allocation from ARIN."}]},"arin_statistics_now":{"status":"reserved"}}