Data as of Nov 8, 2026
100.42.17.0/24
Anonymizer · ISP proxyComcast Cable Communications, LLC · space held by Fork Networking, LLC
Announced by
Type
ISP proxy
Risk
90 / 100 · Critical
Recently moved
Recent change
New origin Sep 28, 2026
from AS46841 Fork Networking, LLC, after 8.3 years unannounced
registry: reallocated to SkyQuantum Internet Service by Fork Networking, LLC, Sep 7, 2026
IPv4 market
Path
Announced by AS33651 since Sep 28, 2026 · 6 wk ago
1 · Holder
record created Nov 17, 2011 · reallocated to SkyQuantum Internet Service Sep 7, 2026
Operators, sellers and brokers
Proxy providers
| Name | Parent | In 100.42.17.0/24 | /24s |
|---|---|---|---|
| SkyQuantum | 256100% | 1 |
Leased from
Owners leasing their own space
| Name | In 100.42.17.0/24 | /24s |
|---|---|---|
| Interworks Networking Services | 256100% | 1 |
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 100.42.16.0/20 since Feb 2023 | AS46841 | Hosting | 13 | Fork Networking, LLC |
Registrations in this block
The registry's network records over this block, widest first, each under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 100.42.16.0/20 | 4,096 | FORK-NETWORKING | Fork Networking, LLC (FORKN) · US | Direct Allocation | Nov 17, 2011 | arin-noc@ |
| └ 100.42.16.0/23 | 512 | SISL-43 | SkyQuantum Internet Service (SISL-43) · US | Reallocated | Sep 7, 2026 | abuse@ |
| └ 100.42.17.0/24 | 256 | NET-100-42-17-0 | Comcast Cable Communications, LLC (C11731245) · US | Reassigned | Oct 7, 2026 | abuse@ via SISL-43 |
A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.
Network & registry
Announced by
Covering announcement 100.42.16.0/23
- Prefix
- 100.42.16.0/23
- Announced by
- AS33651 Comcast Cable Communications, LLC
- Type
- ISP proxy
- Anonymizer addresses
- all
- Operator
- Proxy providersoperated by SkyQuantum
- RPKI
- RPKI valid
- Netname
- SISL-43
- Registrant
- SkyQuantum Internet Service
- RIR
- ARIN
IPv4 market
Holder
- Organization
- Fork Networking, LLC
- Handle
- FORKN
- Range
- 100.
42. 16. 0/ 20 - Registration type
- Direct Allocation
- Record created
- Nov 17, 2011
- Reallocated to
- SkyQuantum Internet Service (SISL-43)
- Reallocated range
- 100.
42. 16. 0/ 23 - Reallocated
- Sep 7, 2026
Origin network
AS33651
US
- Name
- Comcast Cable Communications, LLC
- Type
- Internet provider
- Registered
- Feb 16, 2005
- Domain
- comcast.com
- Website
- corporate.comcast.com/
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
100.42.16.0/23
Routing history
- Pattern
- Reactivated
- First seen
- Aug 2016
- Current origin since
- Sep 28, 2026 · 1 mo
- Origin networks
- 2
- Last change of origin
- Sep 28, 2026
Recorded history
History
- Handoffs
- 1
- Also announced by
- 33667
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 100.42.16.0/23 | AS33651 | /24 | ARIN | RPKI valid |
| 100.42.16.0/23 | AS33667 | /24 | ARIN | Another network |
| 100.42.16.0/20 | AS46841 | /20 | ARIN | Another network |
Whois
Registration for this announcement
- Range
- 100.
42. 16. 0/ 23 - Netname
- SISL-43
- Registrant
- SkyQuantum Internet Service
- Organization
- SkyQuantum Internet Service (SISL-43)
- Org address
- 30 N Gould St Ste N, Sheridan, WY, 82801
- Org country
- US
- Type
- Reallocated
- Handle
- NET-100-42-16-0-2
- Parent
- NET-100-42-16-0-1
- Created
- Sep 7, 2026
- RIR
- ARIN
- Country
- US
- Delegated
- Nov 17, 2011
- Status
- assigned
Report abuse
Abuse contact
- abuse@
adsl. cat - Name
- Abuse
- Phone
- +1-971-333-0066
- Handle
- ABUSE9697-ARIN