📊 IP Addresses Through 2025 — Geoff Huston's comprehensive annual analysis Key findings: - #IPv4 pool contracted 237K addresses - #IPv6 deployment reached 46% - Address transfer market prices fell 50% Full analysis: arin.net/blog/2026/01/22/ip-… #IPaddresses #TechNews @apnic

🌐 IP classes aren’t random — they define network size! A = Large 🏢 | B = Medium 🏘️ | C = Small 🏠 Know this, and subnetting gets way easier. 💡 #CompTIA #NetworkPlus #IPAddresses #NetworkingBasics #CompTIAExamPrep #TechSkills #ITCertification #NetworkingFundamentals

THESE ARE THE FIRST 3 SLIDES ON THE TOPIC BELOW: 👇 𝕏_𝕄𝕒𝕡𝕡𝕖𝕕 𝕓𝕪 𝕀𝕟𝕥𝕖𝕣𝕟𝕖𝕥 𝕔𝕠𝕟𝕟𝕖𝕔𝕥𝕚𝕠𝕟𝕤 (𝕥𝕠𝕡) 𝕒𝕟𝕕 𝕓𝕪 𝕥𝕨𝕖𝕖𝕥𝕤 (𝕓𝕠𝕥𝕥𝕠𝕞)-1 #internet #connection #digitalization #middleeast #ipaddresses

🤔 If we already had Class A, B, and C… why did we need classless addressing? Because classful IPs wasted the internet. Literally 👇 With classful addressing: • Class A = too big • Class B = still too big • Class C = often too small Organizations had only fixed sizes to choose from. Need 2,000 IPs? Class C (254) wasn’t enough. Class B (65,534) was massive overkill. Result? 🚨 Huge IP address waste 🚨 Routing tables growing fast 🚨 IPv4 exhaustion getting closer That’s where classless addressing (CIDR) came in. With CIDR: • Networks can be any size • Subnets are based on actual need, not rigid classes • IPs are used efficiently • Routing tables become smaller and scalable Instead of thinking in classes, we think in prefix lengths (/24, /26, /30…). Classful addressing taught us the basics. Classless addressing made the internet scale.🌐 #Networking #CIDR #IPAddresses #ITBasics #LearningInPublic

2024 #ARINCommunityGrant Report: How #IPaddresses are exploited in #malware & #phishing @dns_rf findings: - 70% of malware uses IP-only addresses - 0.6% of phishing uses IP-only - Live indicators platform launched Read the report: arin.net/blog #CyberSecurity #Grants

Public IP: Identifies your network on the internet 🌍 Private IP: Identifies devices inside your network 🏠 That’s why many devices share one public IP, but still communicate internally without conflict. #Networking #IPAddresses #LearnInPublic

🌐 What is an IP address? Think of it as a home address for your device 🏠 It tells the network who you are and where data should go. IPv4 address classes (beginner view 👇) 🔹 Class A • First octet Numberic Range: 0-127 (127 is loopback) • Subnet: 255.0.0.0 • Network ID: x.0.0.0 • Broadcast: x.255.255.255 • Hosts per network: 16,777,214, (2^host bit count) - 2) • Used for very large networks 🔹 Class B • First octet Numberic Range: 128-191 • Subnet: 255.255.0.0 • Network ID: x.x.0.0 • Broadcast: x.x.255.255 • Hosts per network: 65,534, (2^host bit count) - 2) 🔹 Class C • First octet Numberic Range: 192-223 • Subnet: 255.255.255.0 • Network ID: x.x.x.0 • Broadcast: x.x.x.255 • Hosts per network: 254, (2^host bit count) - 2) 🔹 Class D • Range: 224.0.0.0 – 239.255.255.255 • Used for multicasting • No network/broadcast concept 🔹 Class E • Range: 240.0.0.0 – 255.255.255.254 • Reserved for research & experiments Same IP concept. Different purposes. #Networking #IPAddresses #ITBasics #TechLearning

Understanding IP Address Classes 🌐 When working with IP addresses, it's crucial to know the different classes for better network management. Here's a quick guide: Class A ✔️ Range: 0 – 127 ✔️ Private Range: 10.0.0.0 to 10.255.255.255 ✔️ Ideal for large networks Class B ✔️ Range: 128 – 191 ✔️ Private Range: 172.16.0.0 to 172.31.255.255 ✔️ Perfect for medium-sized networks Class C ✔️ Range: 192 – 223 ✔️ Private Range: 192.168.0.0 to 192.168.255.255 ✔️ Common for small networks Class D ✔️ Range: 224 – 239 ✔️ Reserved for multicast groups Class E ✔️ Range: 240 – 255 ✔️ Reserved for research and development Private IP Ranges are used for local networks, ensuring security and reducing the need for public IP addresses. #TechTips #Networking #IPAddresses #ClassA #ClassB #ClassC #PrivateIPs #Networking101 #Java

💡 Knowledge grows when shared. Let’s learn, collaborate, and strengthen our digital defenses together. 🌍 #CyberSecurity #CIATriad #Encryption #Networking #IPAddresses #CyberAwareness #TechLearning #CyberEducation

Want to hear the latest news on ARIN resources, services, tools, and more? Watch the ARIN Update CXO John Sweeting is giving in 1 hour at #NANOG95. Catch him live or tune in through @NANOG's webcast. #IPv6 #IPv4 #RPKI #RoutingSecurity #NetworkOperators #IPaddresses

Cogent will be attending Fitelven in Caracas, Venezuela, 18 - 21 September. We are looking forward to meeting with you to discuss our connectivity services and our global network. #IPTransit #Wavelengths #IPAddresses #CogentCommunications

Hope these sanctions be included on advertisements in mobile phones when used within #India IPAddresses. The full screen ads do not give an option to exit or navigate out too...

Want to hear the latest news on ARIN resources, services, tools, and more? Watch the ARIN Update CEXO John Sweeting is giving in 1 hour at #NANOG94. Catch him live or tune in through @NANOG's webcast. #IPv6 #IPv4 #RPKI #RoutingSecurity #NetworkOperators #IPaddresses

Wait until they start collecting IPaddresses and report them for threats and harassment

Tune in to the #CaribNOG29 webcast now to see the ARIN update presented by our Director of Customer Tech. Services, Brad Gorman: caribnog.org/webcast #IPv6 #RPKI #RoutingSecurity #IPv4 #IPaddresses

Our next ARIN on the Road event is coming up this Thursday: #Raleigh, we're headed your way! Be sure to register for this no-cost event in advance ⬇️ ℹ️ arin.net/raleigh #Durham #NC #NorthCarolina #IPv4 #IPv6 #RPKI #IPaddresses #RoutingSecurity #InternetGovernance

For the latest news on ARIN resources, services, tools, and more, watch the ARIN Update from CEXO John Sweeting in 15 minutes at #NANOG93. Catch him live in #ATL or tune in virtually through @NANOG's webcast. #IPv6 #IPv4 #RPKI #RoutingSecurity #NetworkOperators #IPaddresses

127.0.0.1:49342 - Detailed Guide on How Localhost Ports Work techgliding.com/2025/01/127-… #localhost #ipaddresses #tech

Still using spreadsheets to monitor #IPaddresses? Our #IPAMtool can help. Add or discover subnets, track statuses, view past events, and do so much more with our IPAM tool. site24x7.com/ip-address-mana…

#SaaS Security #TrustEverybodyButCutTheCards The #SaaS attacks matrix from PushSecurity: useful #attack examples - linkedin.com/posts/francesco… **** #Initialaccess and poisoned tenants - #credentialstuffing and email #phishing - #waterhole attack using poisoned tenant , ie an attacker-controlled tenant. **** Living-off-the-(SaaS)-land to persist and avoid detection - use legit SaaS apps that specialize in workflow automation to create shadow workflows - best example here is using a well-known automation app like #Zapier How #SAML, #OAuth & #OIDC are different, their application and how it works? - linkedin.com/posts/francesco… “They Live": non-human identities in the world of #SaaS **** In the world of SaaS, non-human actors, i.e. #3rdparty connected apps count multiple times human ones - linkedin.com/posts/francesco… - #serviceaccounts - #OAuth authorizations - #APIkeys **** Examples - linkedin.com/posts/francesco… - #Calendly integrating with #GoogleWorkspace through an OAuth authorization: the integration is initiated by a human, but Calendly is non-human. -#SwiftPOS,  a #pointofsale ( #POS) application and device transfers POS data to a #businessintelligence platform, like #Microsoft #PowerBI, through a non-human account. **** #Risks of Non-human Accounts - linkedin.com/posts/francesco… - Every SaaS app has its own approach to managing these types of user accounts - Non-human accounts are authenticated one time and forgotten - #MFA or #SSO don't apply well. - Humans have typical #behavior patterns, such as logging on to applications during working hours. Non-human accounts often access apps during off-peak time to reduce network traffic - In an effort to simplify non-human #accountmanagement, many organizations use the same #APIkey for all integrations. - Non-human accounts are largely unmonitored and have wide-ranging #permission scopes. **** Securing Non-human Accounts - linkedin.com/posts/francesco… - Non-human accounts require the same #visibility by security teams as human accounts:    - #Risk level associated with the user based on #role and existing configurations    - Activated/deactivated #users    - Dormant users    - Orphan users    - Privileged roles assigned to the user    - All apps user is #connected to    - Failed #securitychecks    - User devices being used    - Users with multiple #login usernames (accounts). Non-human accounts:    - should be limited to specific #IPaddresses that are pre-approved on an #allowlist    - should not be granted access through the standard #loginscreens     - should have #permissions should be tailored to meet their specific needs as apps, and not be wide-ranging or matching their human counterparts     - should be used under a strict policy of prohibiting #accountsharing. Non-human accounts may access SaaS apps at all hours of the night, but they are usually fairly consistent in their interactions: this is where #ITDR plays an important role #OAuth 2.0 and #OIDC: the foundation of #APIsecurity - linkedin.com/posts/francesco… #TrustEverybodyButCutTheCards