Every change the tracker has found, newest first. It covers ARIN from 2008-12-01, the RIPE NCC from 2010-04-23, APNIC from 2008-02-15, LACNIC from 2012-06-29 and AFRINIC from 2012-10-03.
ARIN's transfer log records a transfer from Virgin Technologies Inc (ARIN) to Chronosphere, Inc. (ARIN) on 2025-10-21 18:37 UTC. ARIN-Issued lists it as "Add" because the registration changed hands; it is not a new allocation from ARIN.
Evidence (4) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2025-10-21: "Add 74.112.188.0-74.112.191.255"source · retrieved
Transfer logTransfer log: RESOURCE_TRANSFER on 2025-10-21 18:37 UTC, Virgin Technologies Inc (ARIN) to Chronosphere, Inc. (ARIN); resources moved: 74.112.188.0/22source · retrieved
BeforeARIN delegated statistics 2025-10-20 (produced 2025-10-20T13:00:47+00:00), before the report: allocated (dated 2011-08-18)source · retrieved
AfterARIN delegated statistics 2025-10-22 (produced 2025-10-22T13:00:46+00:00), after the report: allocated (dated 2025-10-21)source · retrieved
Classification history for this change (4 versions)
: Intra-ARIN transfer, confirmed (classifier 1.4.0) current
2011-08-18ARIN+ AddApparent reissuance of previously removed resourceObserved only
ARIN-Issued
Add 74.112.188.0-74.112.191.255
Inventory
Likely issued from ARIN-controlled inventory
No transfer record matches. ARIN's statistics show it not issued on 2011-08-17 and allocated (dated 2011-08-18) on 2011-08-19. (Until 2013-03-05, ARIN's statistics list only what's issued.) The tracker saw this range released from hold on 2011-08-17 (74.112.188.0-74.112.191.255), so it appears to have been issued again from ARIN's pool. Another change to this range was reported the day before or after (2011-08-17: Remove 74.112.188.0-74.112.191.255), so the before-and-after statistics may include it.
Evidence (3) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2011-08-18: "Add 74.112.188.0-74.112.191.255"source · retrieved
BeforeARIN delegated statistics 2011-08-17, before the report: not issuedsource · retrieved
AfterARIN delegated statistics 2011-08-19, after the report: allocated (dated 2011-08-18)source · retrieved
Classification history for this change (4 versions)
: Apparent reissuance of previously removed resource, observed only (classifier 1.3.0)
: Apparent reissuance of previously removed resource, observed only (classifier 1.3.1)
: Apparent reissuance of previously removed resource, observed only (classifier 1.3.2)
: Apparent reissuance of previously removed resource, observed only (classifier 1.4.0) current
2011-08-17ARIN− RemoveUnresolved changeObserved only
ARIN-Issued
Remove 74.112.188.0-74.112.191.255
Inventory
Inventory effect unknown
ARIN-Issued says "Remove", but ARIN's statistics show it not issued on 2011-08-16 and not issued on 2011-08-18. (Until 2013-03-05, ARIN's statistics list only what's issued.) The registry's pool records from that time aren't public, so the tracker can't tell what was removed. Another change to this range was reported the day before or after (2011-08-18: Add 74.112.188.0-74.112.191.255), so the before-and-after statistics may include it.
Evidence (3) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2011-08-17: "Remove 74.112.188.0-74.112.191.255"source · retrieved
BeforeARIN delegated statistics 2011-08-16, before the report: not issuedsource · retrieved
AfterARIN delegated statistics 2011-08-18, after the report: not issuedsource · retrieved
Classification history for this change (4 versions)
: Unresolved change, observed only (classifier 1.3.0)
: Unresolved change, observed only (classifier 1.3.1)
: Unresolved change, observed only (classifier 1.3.2)
: Unresolved change, observed only (classifier 1.4.0) current
2011-02-09ARINNot in ARIN-IssuedRemoved (return, revocation or reclamation not publicly distinguishable)Strong inference
Inventory
Possible future reissue candidate after hold
Hold estimate
Estimated hold end 2011-04-10. Possible reissue candidate after this date; not confirmed available.
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 2009-04-24) on 2011-02-08 and not issued on 2011-02-10. (Until 2013-03-05, ARIN's statistics list only what's issued.) 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 2011-04-10. This does not confirm availability.
Evidence (3) · classifier 1.4.0,
StatisticsNot listed in ARIN-Issued; found by comparing ARIN's daily statistics: 74.112.188.0/22 allocated on 2011-02-09, not listed on 2011-02-10source · retrieved
BeforeARIN delegated statistics 2011-02-08, before the report: allocated (dated 2009-04-24)source · retrieved
AfterARIN delegated statistics 2011-02-10, after the report: not issuedsource · retrieved
Classification history for this change (4 versions)
: Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.3.0)
: Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.3.1)
: Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.3.2)
: Removed (return, revocation or reclamation not publicly distinguishable), strong inference (classifier 1.4.0) current
2009-04-24ARIN+ AddApparent new issuanceStrong inference
ARIN-Issued
Add 74.112.188.0-74.112.191.255
Inventory
Likely issued from ARIN-controlled inventory
No transfer record matches. ARIN's statistics show it not issued on 2009-04-23 and allocated (dated 2009-04-24) on 2009-04-25. (Until 2013-03-05, ARIN's statistics list only what's issued.) It moved from ARIN's unissued pool to an active registration dated around the report, so it appears to be newly issued by ARIN.
Evidence (3) · classifier 1.4.0,
ARIN-IssuedARIN-Issued report for 2009-04-24: "Add 74.112.188.0-74.112.191.255"source · retrieved
BeforeARIN delegated statistics 2009-04-23, before the report: not issuedsource · retrieved
AfterARIN delegated statistics 2009-04-25, after the report: allocated (dated 2009-04-24)source · retrieved
Classification history for this change (4 versions)
Every record in the ARIN, RIPE NCC, APNIC, LACNIC and AFRINIC transfer logs that moved any part of this IPv4 range (ARIN's from 2009, the RIPE NCC's from 2012, APNIC's from 2010, LACNIC's from 2016, AFRINIC's from 2018). A transfer between two registries is in both logs.
RDAP lookups
Not looked up. The tracker queries RDAP for changes as they're reported (on first sight, after 24 hours and after seven days); older changes aren't looked up because today's RDAP says nothing about the past.